{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "socket-head-cap-screws-inch-full",
 "name": "Socket head cap screws, inch #0 to 1-1/2 (ASME B18.3): head, hex socket, key engagement — full size table + models #0 to 1",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What are the head diameter, head height and hex key size of a #4-40, #8-32, 1/4-20, 5/8-11 or 1 in socket head cap screw?",
 "tags": [
  "socket head cap screw",
  "shcs",
  "allen screw",
  "hex socket",
  "asme b18.3",
  "inch",
  "cap screw",
  "fastener",
  "unc",
  "unf"
 ],
 "aliases": [
  "socket head cap screw dimensions chart",
  "4-40 socket head cap screw head diameter",
  "1/4-20 shcs head diameter",
  "8-32 socket head cap screw hex key",
  "socket head cap screw size chart inch",
  "shcs counterbore",
  "5/8-11 socket head cap screw head height",
  "3/4-10 socket head cap screw hex size",
  "#0-80 socket head cap screw",
  "asme b18.3 socket head cap screw",
  "shcs head dia and height table",
  "socket cap screw key engagement"
 ],
 "overall_mm": {
  "length": 50.8,
  "width": 38.1,
  "height": 76.2
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 18,
 "url": "https://xemstudio.com/objects/socket-head-cap-screws-inch-full/",
 "sheet_txt": "https://xemstudio.com/objects/socket-head-cap-screws-inch-full/sheet.txt",
 "sheet": {
  "basis": "A maker sheet carrying the ASME B18.3-1998 SHCS table (checked against AFT Fasteners' ASME B18.3-2003 table for #10, 1/4, 1/2 and 1), thread series from ASME B1.1 (Engineering ToolBox); 18 envelope models as files",
  "overall_mm": {
   "length": 50.8,
   "width": 38.1,
   "height": 76.2
  },
  "notes": [
   "Inch dimensions per ASME B18.3 as printed on the sheet: body diameter D max / min, head diameter A max / min, head height H max / min, hex socket size (nominal), key engagement T min, wall thickness min, fillet transition diameter max / min, top and bottom chamfer or radius max, basic thread length LT (1/4 to 1 in). Sizes #0 to 1-1/2 are tabulated; head height equals the nominal diameter on every size. The sheet's column letters for the last columns are not decoded in the text read, so those columns are named by their printed words. AFT's ASME B18.3-2003 table prints the same D, A, H and key engagement values for #10, 1/4, 1/2 and 1 (its 'J' column holds the fillet transition diameter, which equals the sheet's value), so the two editions agree on these.",
   "Overlap: the pages socket-head-cap-screws-inch (#10-24, #10-32, 5/16-18, 3/8-16, 1/2-13, existing) and imperial-machine-screws (#4 to 1/4-20) already hold a few of these sizes with their own files. This page is the complete table; its files use the dimensions on this page (head and height maxima, hex across flats, key engagement) and a different example length rule, so they are not identical to the older files.",
   "Files are Xem-drawn envelopes at true nominal size: head cylinder A max x H max, hex socket at the nominal across-flats size and the minimum key-engagement depth, plain shank at D max (the real thread is smaller at the root). No top chamfer, no under-head fillet, no socket cone (those are published as limits or not as numbers). Example lengths (0.25 in for #0 to #3, 0.5 in for #4 to #10, 1 in for 1/4 to 3/8, 1.5 in for 7/16 to 5/8, 2 in for 3/4 to 1) are Xem's choice. Sizes 1-1/4 and 1-1/2 are in the table only.",
   "The sheet gives the length tolerance, thread lengths and mechanical properties for stainless steel; strength values are not repeated here. Metric: socket-head-cap-screws-metric. Button head, flat head and low head inch socket screws are separate pages."
  ],
  "table": {
   "columns": [
    "size",
    "TPI UNC / UNF",
    "body D max / min (in)",
    "head A max / min (in)",
    "head height H max / min (in)",
    "hex socket nominal",
    "key engagement T min (in)",
    "wall min (in)",
    "fillet transition dia max / min (in)",
    "top chamfer max (in)",
    "bottom chamfer max (in)",
    "basic thread length LT (in)",
    "D max (mm, computed)",
    "head dia x height max (mm, computed)"
   ],
   "rows": [
    [
     "#0",
     "— / 80",
     "0.0600 / 0.0568",
     "0.096 / 0.091",
     "0.060 / 0.057",
     ".050 in",
     "0.025",
     "0.020",
     "0.074 / 0.063",
     "0.004",
     "0.007",
     "—",
     "1.524",
     "2.44 x 1.52"
    ],
    [
     "#1",
     "64 / 72",
     "0.0730 / 0.0695",
     "0.118 / 0.112",
     "0.073 / 0.070",
     "1/16 in",
     "0.031",
     "0.025",
     "0.087 / 0.076",
     "0.005",
     "0.007",
     "—",
     "1.854",
     "3.00 x 1.85"
    ],
    [
     "#2",
     "56 / 64",
     "0.0860 / 0.0822",
     "0.140 / 0.134",
     "0.086 / 0.083",
     "5/64 in",
     "0.038",
     "0.029",
     "0.102 / 0.090",
     "0.008",
     "0.007",
     "—",
     "2.184",
     "3.56 x 2.18"
    ],
    [
     "#3",
     "48 / 56",
     "0.0990 / 0.0949",
     "0.161 / 0.154",
     "0.099 / 0.095",
     "5/64 in",
     "0.044",
     "0.034",
     "0.115 / 0.103",
     "0.008",
     "0.007",
     "—",
     "2.515",
     "4.09 x 2.51"
    ],
    [
     "#4",
     "40 / 48",
     "0.1120 / 0.1075",
     "0.183 / 0.176",
     "0.112 / 0.108",
     "3/32 in",
     "0.051",
     "0.038",
     "0.130 / 0.118",
     "0.009",
     "0.008",
     "—",
     "2.845",
     "4.65 x 2.84"
    ],
    [
     "#5",
     "40 / 44",
     "0.1250 / 0.1202",
     "0.205 / 0.198",
     "0.125 / 0.121",
     "3/32 in",
     "0.057",
     "0.043",
     "0.145 / 0.132",
     "0.012",
     "0.008",
     "—",
     "3.175",
     "5.21 x 3.17"
    ],
    [
     "#6",
     "32 / 40",
     "0.1380 / 0.1329",
     "0.226 / 0.218",
     "0.138 / 0.134",
     "7/64 in",
     "0.064",
     "0.047",
     "0.158 / 0.145",
     "0.013",
     "0.008",
     "—",
     "3.505",
     "5.74 x 3.51"
    ],
    [
     "#8",
     "32 / 36",
     "0.1640 / 0.1585",
     "0.270 / 0.262",
     "0.164 / 0.159",
     "9/64 in",
     "0.077",
     "0.056",
     "0.188 / 0.173",
     "0.014",
     "0.008",
     "—",
     "4.166",
     "6.86 x 4.17"
    ],
    [
     "#10",
     "24 / 32",
     "0.1900 / 0.1840",
     "0.312 / 0.303",
     "0.190 / 0.185",
     "5/32 in",
     "0.090",
     "0.065",
     "0.218 / 0.202",
     "0.018",
     "0.008",
     "—",
     "4.826",
     "7.92 x 4.83"
    ],
    [
     "1/4",
     "20 / 28",
     "0.2500 / 0.2435",
     "0.375 / 0.365",
     "0.250 / 0.244",
     "3/16 in",
     "0.120",
     "0.095",
     "0.278 / 0.262",
     "0.025",
     "0.010",
     "1.000",
     "6.350",
     "9.52 x 6.35"
    ],
    [
     "5/16",
     "18 / 24",
     "0.3125 / 0.3053",
     "0.469 / 0.457",
     "0.312 / 0.306",
     "1/4 in",
     "0.151",
     "0.119",
     "0.347 / 0.329",
     "0.033",
     "0.010",
     "1.125",
     "7.938",
     "11.91 x 7.92"
    ],
    [
     "3/8",
     "16 / 24",
     "0.3750 / 0.3678",
     "0.562 / 0.550",
     "0.375 / 0.368",
     "5/16 in",
     "0.182",
     "0.143",
     "0.415 / 0.398",
     "0.040",
     "0.010",
     "1.250",
     "9.525",
     "14.27 x 9.52"
    ],
    [
     "7/16",
     "14 / 20",
     "0.4375 / 0.4294",
     "0.656 / 0.642",
     "0.438 / 0.430",
     "3/8 in",
     "0.213",
     "0.166",
     "0.484 / 0.465",
     "0.047",
     "0.015",
     "1.375",
     "11.112",
     "16.66 x 11.13"
    ],
    [
     "1/2",
     "13 / 20",
     "0.5000 / 0.4919",
     "0.750 / 0.735",
     "0.500 / 0.492",
     "3/8 in",
     "0.245",
     "0.190",
     "0.552 / 0.532",
     "0.055",
     "0.015",
     "1.500",
     "12.700",
     "19.05 x 12.70"
    ],
    [
     "5/8",
     "11 / 18",
     "0.6250 / 0.6163",
     "0.938 / 0.921",
     "0.625 / 0.616",
     "1/2 in",
     "0.307",
     "0.238",
     "0.689 / 0.664",
     "0.070",
     "0.015",
     "1.750",
     "15.875",
     "23.83 x 15.88"
    ],
    [
     "3/4",
     "10 / 16",
     "0.7500 / 0.7406",
     "1.125 / 1.107",
     "0.750 / 0.740",
     "5/8 in",
     "0.370",
     "0.285",
     "0.828 / 0.801",
     "0.085",
     "0.015",
     "2.000",
     "19.050",
     "28.57 x 19.05"
    ],
    [
     "7/8",
     "9 / 14",
     "0.8750 / 0.8647",
     "1.312 / 1.293",
     "0.875 / 0.864",
     "3/4 in",
     "0.432",
     "0.333",
     "0.963 / 0.933",
     "0.100",
     "0.020",
     "2.250",
     "22.225",
     "33.32 x 22.22"
    ],
    [
     "1",
     "8 / 12",
     "1.0000 / 0.9886",
     "1.500 / 1.479",
     "1.000 / 0.988",
     "3/4 in",
     "0.495",
     "0.380",
     "1.100 / 1.069",
     "0.114",
     "0.020",
     "2.500",
     "25.400",
     "38.10 x 25.40"
    ],
    [
     "1-1/4",
     "7 / 12",
     "1.2500 / 1.2336",
     "1.875 / 1.852",
     "1.250 / 1.236",
     "7/8 in",
     "0.620",
     "0.475",
     "1.370 / 1.334",
     "0.144",
     "0.020",
     "—",
     "31.750",
     "47.62 x 31.75"
    ],
    [
     "1-1/2",
     "6 / 12",
     "1.5000 / 1.4818",
     "2.250 / 2.224",
     "1.500 / 1.485",
     "1 in",
     "0.745",
     "0.570",
     "1.640 / 1.602",
     "0.176",
     "0.020",
     "—",
     "38.100",
     "57.15 x 38.10"
    ]
   ]
  }
 },
 "sheet_text": "Socket head cap screws, inch #0 to 1-1/2 (ASME B18.3): head, hex socket, key engagement — full size table + models #0 to 1 — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/socket-head-cap-screws-inch-full/  (sheet CC BY 4.0)\nBasis: A maker sheet carrying the ASME B18.3-1998 SHCS table (checked against AFT Fasteners' ASME B18.3-2003 table for #10, 1/4, 1/2 and 1), thread series from ASME B1.1 (Engineering ToolBox); 18 envelope models as files\nCatalog version: 2026-10-20\n\nOverall (mm): length 50.8, width 38.1, height 76.2\n- Inch dimensions per ASME B18.3 as printed on the sheet: body diameter D max / min, head diameter A max / min, head height H max / min, hex socket size (nominal), key engagement T min, wall thickness min, fillet transition diameter max / min, top and bottom chamfer or radius max, basic thread length LT (1/4 to 1 in). Sizes #0 to 1-1/2 are tabulated; head height equals the nominal diameter on every size. The sheet's column letters for the last columns are not decoded in the text read, so those columns are named by their printed words. AFT's ASME B18.3-2003 table prints the same D, A, H and key engagement values for #10, 1/4, 1/2 and 1 (its 'J' column holds the fillet transition diameter, which equals the sheet's value), so the two editions agree on these.\n- Overlap: the pages socket-head-cap-screws-inch (#10-24, #10-32, 5/16-18, 3/8-16, 1/2-13, existing) and imperial-machine-screws (#4 to 1/4-20) already hold a few of these sizes with their own files. This page is the complete table; its files use the dimensions on this page (head and height maxima, hex across flats, key engagement) and a different example length rule, so they are not identical to the older files.\n- Files are Xem-drawn envelopes at true nominal size: head cylinder A max x H max, hex socket at the nominal across-flats size and the minimum key-engagement depth, plain shank at D max (the real thread is smaller at the root). No top chamfer, no under-head fillet, no socket cone (those are published as limits or not as numbers). Example lengths (0.25 in for #0 to #3, 0.5 in for #4 to #10, 1 in for 1/4 to 3/8, 1.5 in for 7/16 to 5/8, 2 in for 3/4 to 1) are Xem's choice. Sizes 1-1/4 and 1-1/2 are in the table only.\n- The sheet gives the length tolerance, thread lengths and mechanical properties for stainless steel; strength values are not repeated here. Metric: socket-head-cap-screws-metric. Button head, flat head and low head inch socket screws are separate pages.\n\nsize  TPI UNC / UNF  body D max / min (in)  head A max / min (in)  head height H max / min (in)  hex socket nominal  key engagement T min (in)  wall min (in)  fillet transition dia max / min (in)  top chamfer max (in)  bottom chamfer max (in)  basic thread length LT (in)  D max (mm, computed)  head dia x height max (mm, computed)\n#0  — / 80  0.0600 / 0.0568  0.096 / 0.091  0.060 / 0.057  .050 in  0.025  0.020  0.074 / 0.063  0.004  0.007  —  1.524  2.44 x 1.52\n#1  64 / 72  0.0730 / 0.0695  0.118 / 0.112  0.073 / 0.070  1/16 in  0.031  0.025  0.087 / 0.076  0.005  0.007  —  1.854  3.00 x 1.85\n#2  56 / 64  0.0860 / 0.0822  0.140 / 0.134  0.086 / 0.083  5/64 in  0.038  0.029  0.102 / 0.090  0.008  0.007  —  2.184  3.56 x 2.18\n#3  48 / 56  0.0990 / 0.0949  0.161 / 0.154  0.099 / 0.095  5/64 in  0.044  0.034  0.115 / 0.103  0.008  0.007  —  2.515  4.09 x 2.51\n#4  40 / 48  0.1120 / 0.1075  0.183 / 0.176  0.112 / 0.108  3/32 in  0.051  0.038  0.130 / 0.118  0.009  0.008  —  2.845  4.65 x 2.84\n#5  40 / 44  0.1250 / 0.1202  0.205 / 0.198  0.125 / 0.121  3/32 in  0.057  0.043  0.145 / 0.132  0.012  0.008  —  3.175  5.21 x 3.17\n#6  32 / 40  0.1380 / 0.1329  0.226 / 0.218  0.138 / 0.134  7/64 in  0.064  0.047  0.158 / 0.145  0.013  0.008  —  3.505  5.74 x 3.51\n#8  32 / 36  0.1640 / 0.1585  0.270 / 0.262  0.164 / 0.159  9/64 in  0.077  0.056  0.188 / 0.173  0.014  0.008  —  4.166  6.86 x 4.17\n#10  24 / 32  0.1900 / 0.1840  0.312 / 0.303  0.190 / 0.185  5/32 in  0.090  0.065  0.218 / 0.202  0.018  0.008  —  4.826  7.92 x 4.83\n1/4  20 / 28  0.2500 / 0.2435  0.375 / 0.365  0.250 / 0.244  3/16 in  0.120  0.095  0.278 / 0.262  0.025  0.010  1.000  6.350  9.52 x 6.35\n5/16  18 / 24  0.3125 / 0.3053  0.469 / 0.457  0.312 / 0.306  1/4 in  0.151  0.119  0.347 / 0.329  0.033  0.010  1.125  7.938  11.91 x 7.92\n3/8  16 / 24  0.3750 / 0.3678  0.562 / 0.550  0.375 / 0.368  5/16 in  0.182  0.143  0.415 / 0.398  0.040  0.010  1.250  9.525  14.27 x 9.52\n7/16  14 / 20  0.4375 / 0.4294  0.656 / 0.642  0.438 / 0.430  3/8 in  0.213  0.166  0.484 / 0.465  0.047  0.015  1.375  11.112  16.66 x 11.13\n1/2  13 / 20  0.5000 / 0.4919  0.750 / 0.735  0.500 / 0.492  3/8 in  0.245  0.190  0.552 / 0.532  0.055  0.015  1.500  12.700  19.05 x 12.70\n5/8  11 / 18  0.6250 / 0.6163  0.938 / 0.921  0.625 / 0.616  1/2 in  0.307  0.238  0.689 / 0.664  0.070  0.015  1.750  15.875  23.83 x 15.88\n3/4  10 / 16  0.7500 / 0.7406  1.125 / 1.107  0.750 / 0.740  5/8 in  0.370  0.285  0.828 / 0.801  0.085  0.015  2.000  19.050  28.57 x 19.05\n7/8  9 / 14  0.8750 / 0.8647  1.312 / 1.293  0.875 / 0.864  3/4 in  0.432  0.333  0.963 / 0.933  0.100  0.020  2.250  22.225  33.32 x 22.22\n1  8 / 12  1.0000 / 0.9886  1.500 / 1.479  1.000 / 0.988  3/4 in  0.495  0.380  1.100 / 1.069  0.114  0.020  2.500  25.400  38.10 x 25.40\n1-1/4  7 / 12  1.2500 / 1.2336  1.875 / 1.852  1.250 / 1.236  7/8 in  0.620  0.475  1.370 / 1.334  0.144  0.020  —  31.750  47.62 x 31.75\n1-1/2  6 / 12  1.5000 / 1.4818  2.250 / 2.224  1.500 / 1.485  1 in  0.745  0.570  1.640 / 1.602  0.176  0.020  —  38.100  57.15 x 38.10\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Stainless-steel fastener maker sheet (hosted on a Shopify CDN, ASME B18.3-1998 table): Socket head cap screw dimensions #0 to 1-1/2: body D, head A, head height H, hex socket, key engagement, wall, chamfers, thread length LT — web — Publisher's page; dimensions are facts — https://cdn2.shopify.com/s/files/1/0056/7856/3437/files/SocketscapSS.pdf\n- AFT Fasteners: Standard socket head cap screw dimensions, ASME B18.3-2003 (cross-check of D, A, H, key engagement for #10, 1/4, 1/2, 1) — web — Publisher's page; dimensions are facts — https://aftfasteners.com/socket-cap-screws-dimensions-and-mechanical-properties\n- Engineering ToolBox: ANSI/ASME B1.1 Unified National threads, UNC and UNF: TPI, major diameter in / mm, tap drill mm, pitch mm, #0 to 4 in — web — Publisher's page; dimensions are facts — https://www.engineeringtoolbox.com/unified-screw-threads-unc-unf-d_1809.html\n- McMaster-Carr: Socket head screws (cap, flat, set) (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/socket-head-screws/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 18 parts): https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/index.json\nAPI: https://xemstudio.com/api/geometry?object=socket-head-cap-screws-inch-full\n",
 "sources": [
  {
   "publisher": "Stainless-steel fastener maker sheet (hosted on a Shopify CDN, ASME B18.3-1998 table)",
   "title": "Socket head cap screw dimensions #0 to 1-1/2: body D, head A, head height H, hex socket, key engagement, wall, chamfers, thread length LT",
   "url": "https://cdn2.shopify.com/s/files/1/0056/7856/3437/files/SocketscapSS.pdf",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "AFT Fasteners",
   "title": "Standard socket head cap screw dimensions, ASME B18.3-2003 (cross-check of D, A, H, key engagement for #10, 1/4, 1/2, 1)",
   "url": "https://aftfasteners.com/socket-cap-screws-dimensions-and-mechanical-properties",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Engineering ToolBox",
   "title": "ANSI/ASME B1.1 Unified National threads, UNC and UNF: TPI, major diameter in / mm, tap drill mm, pitch mm, #0 to 4 in",
   "url": "https://www.engineeringtoolbox.com/unified-screw-threads-unc-unf-d_1809.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "McMaster-Carr",
   "title": "Socket head screws (cap, flat, set) (free STEP/IGES per part, for your own design use; no redistribution)",
   "url": "https://www.mcmaster.com/products/socket-head-screws/",
   "formats": [
    "STEP",
    "IGES",
    "PDF"
   ],
   "license": "McMaster-Carr site terms: personal design use, no redistribution",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "socket-head-cap-screws-inch",
  "imperial-machine-screws",
  "flat-head-socket-cap-screws-inch",
  "button-head-socket-screws-inch",
  "socket-set-screws-inch-asme-b18-3",
  "thread-reference-tap-drills-clearance",
  "socket-head-cap-screws-metric",
  "shoulder-screws-asme-b18-3",
  "hex-bolts-inch",
  "hex-keys-iso-2936-asme-b18-3"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no tolerance added)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no tolerance added. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn. Typical accuracy by process and ISO 286 fits: https://xemstudio.com/tolerances/",
 "mating": [
  {
   "feature": "shank (thread as plain cylinder)",
   "exact": "D max per size: #4 Ø2.845, #10 Ø4.826, 1/4 Ø6.350, 3/8 Ø9.525, 1/2 Ø12.700, 1 Ø25.400 mm",
   "mates": "tapped hole at the tap drill, or clearance hole (close / normal / loose), see thread-reference-tap-drills-clearance",
   "fit": "designed",
   "files": "all"
  },
  {
   "feature": "head",
   "exact": "A max × H max per size: #8 0.270 × 0.164 in, 1/4 0.375 × 0.250 in (9.53 × 6.35 mm), 3/8 0.562 × 0.375 in, 1/2 0.750 × 0.500 in",
   "mates": "round counterbore: Ø = A max + your process clearance, depth = H max",
   "fit": "slide",
   "files": "shcs-"
  },
  {
   "feature": "hex socket",
   "exact": "nominal across flats: #8 9/64, 1/4 3/16, 5/16 1/4, 3/8 5/16, 1/2 3/8, 5/8 1/2 in; key engagement 0.120 in min for 1/4",
   "mates": "hex key of the same size (inch series)",
   "fit": "slide",
   "files": "shcs-"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. ISO 286 equivalent: H7/p6 (locational interference) or tighter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. ISO 286 equivalent: H7/g6 or H7/h6.",
  "run": "turns or slides in use: pin in a link, rod through a guide. ISO 286 equivalent: H8/f7 (close running).",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. ISO 286 equivalent: H9/d9 (free running) or looser.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "What is the head diameter of a 1/4-20 socket head cap screw?",
   "a": "0.375 in max and 0.365 in min (9.53 mm), head height 0.250 in max / 0.244 in min, 3/16 in hex socket, key engagement 0.120 in min (ASME B18.3 as printed; AFT agrees)."
  },
  {
   "q": "What hex key fits a #8-32 socket head cap screw?",
   "a": "9/64 in (nominal hex socket size); head 0.270 in max x 0.164 in high."
  },
  {
   "q": "What size hex key for a 5/8-11 socket head cap screw?",
   "a": "1/2 in; head diameter 0.938 in max, height 0.625 in max, key engagement 0.307 in min."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "shcs-no0-80x6.35mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no0-80x6.35mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no0-80x6.35mm.stl",
   "note": "#0 socket head cap screw envelope: head Ø2.44 mm (A max 0.096 in) x 1.52 mm (H max 0.060 in), hex socket .050 in across flats x 0.025 in deep (key engagement min), plain Ø1.524 mm shank (D max), example length under the head 0.25 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no1-64x6.35mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no1-64x6.35mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no1-64x6.35mm.stl",
   "note": "#1 socket head cap screw envelope: head Ø3.00 mm (A max 0.118 in) x 1.85 mm (H max 0.073 in), hex socket 1/16 in across flats x 0.031 in deep (key engagement min), plain Ø1.854 mm shank (D max), example length under the head 0.25 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no2-56x6.35mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no2-56x6.35mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no2-56x6.35mm.stl",
   "note": "#2 socket head cap screw envelope: head Ø3.56 mm (A max 0.140 in) x 2.18 mm (H max 0.086 in), hex socket 5/64 in across flats x 0.038 in deep (key engagement min), plain Ø2.184 mm shank (D max), example length under the head 0.25 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no3-48x6.35mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no3-48x6.35mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no3-48x6.35mm.stl",
   "note": "#3 socket head cap screw envelope: head Ø4.09 mm (A max 0.161 in) x 2.51 mm (H max 0.099 in), hex socket 5/64 in across flats x 0.044 in deep (key engagement min), plain Ø2.515 mm shank (D max), example length under the head 0.25 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no4-40x12.7mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no4-40x12.7mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no4-40x12.7mm.stl",
   "note": "#4 socket head cap screw envelope: head Ø4.65 mm (A max 0.183 in) x 2.84 mm (H max 0.112 in), hex socket 3/32 in across flats x 0.051 in deep (key engagement min), plain Ø2.845 mm shank (D max), example length under the head 0.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no5-40x12.7mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no5-40x12.7mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no5-40x12.7mm.stl",
   "note": "#5 socket head cap screw envelope: head Ø5.21 mm (A max 0.205 in) x 3.17 mm (H max 0.125 in), hex socket 3/32 in across flats x 0.057 in deep (key engagement min), plain Ø3.175 mm shank (D max), example length under the head 0.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no6-32x12.7mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no6-32x12.7mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no6-32x12.7mm.stl",
   "note": "#6 socket head cap screw envelope: head Ø5.74 mm (A max 0.226 in) x 3.51 mm (H max 0.138 in), hex socket 7/64 in across flats x 0.064 in deep (key engagement min), plain Ø3.505 mm shank (D max), example length under the head 0.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no8-32x12.7mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no8-32x12.7mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no8-32x12.7mm.stl",
   "note": "#8 socket head cap screw envelope: head Ø6.86 mm (A max 0.270 in) x 4.17 mm (H max 0.164 in), hex socket 9/64 in across flats x 0.077 in deep (key engagement min), plain Ø4.166 mm shank (D max), example length under the head 0.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-no10-24x12.7mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no10-24x12.7mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-no10-24x12.7mm.stl",
   "note": "#10 socket head cap screw envelope: head Ø7.92 mm (A max 0.312 in) x 4.83 mm (H max 0.190 in), hex socket 5/32 in across flats x 0.090 in deep (key engagement min), plain Ø4.826 mm shank (D max), example length under the head 0.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-1-4-20x25.4mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-1-4-20x25.4mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-1-4-20x25.4mm.stl",
   "note": "1/4 socket head cap screw envelope: head Ø9.52 mm (A max 0.375 in) x 6.35 mm (H max 0.250 in), hex socket 3/16 in across flats x 0.120 in deep (key engagement min), plain Ø6.350 mm shank (D max), example length under the head 1.0 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-5-16-18x25.4mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-5-16-18x25.4mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-5-16-18x25.4mm.stl",
   "note": "5/16 socket head cap screw envelope: head Ø11.91 mm (A max 0.469 in) x 7.92 mm (H max 0.312 in), hex socket 1/4 in across flats x 0.151 in deep (key engagement min), plain Ø7.938 mm shank (D max), example length under the head 1.0 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-3-8-16x25.4mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-3-8-16x25.4mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-3-8-16x25.4mm.stl",
   "note": "3/8 socket head cap screw envelope: head Ø14.27 mm (A max 0.562 in) x 9.52 mm (H max 0.375 in), hex socket 5/16 in across flats x 0.182 in deep (key engagement min), plain Ø9.525 mm shank (D max), example length under the head 1.0 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-7-16-14x38.1mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-7-16-14x38.1mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-7-16-14x38.1mm.stl",
   "note": "7/16 socket head cap screw envelope: head Ø16.66 mm (A max 0.656 in) x 11.13 mm (H max 0.438 in), hex socket 3/8 in across flats x 0.213 in deep (key engagement min), plain Ø11.112 mm shank (D max), example length under the head 1.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-1-2-13x38.1mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-1-2-13x38.1mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-1-2-13x38.1mm.stl",
   "note": "1/2 socket head cap screw envelope: head Ø19.05 mm (A max 0.750 in) x 12.70 mm (H max 0.500 in), hex socket 3/8 in across flats x 0.245 in deep (key engagement min), plain Ø12.700 mm shank (D max), example length under the head 1.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-5-8-11x38.1mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-5-8-11x38.1mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-5-8-11x38.1mm.stl",
   "note": "5/8 socket head cap screw envelope: head Ø23.83 mm (A max 0.938 in) x 15.88 mm (H max 0.625 in), hex socket 1/2 in across flats x 0.307 in deep (key engagement min), plain Ø15.875 mm shank (D max), example length under the head 1.5 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-3-4-10x50.8mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-3-4-10x50.8mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-3-4-10x50.8mm.stl",
   "note": "3/4 socket head cap screw envelope: head Ø28.57 mm (A max 1.125 in) x 19.05 mm (H max 0.750 in), hex socket 5/8 in across flats x 0.370 in deep (key engagement min), plain Ø19.050 mm shank (D max), example length under the head 2.0 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-7-8-9x50.8mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-7-8-9x50.8mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-7-8-9x50.8mm.stl",
   "note": "7/8 socket head cap screw envelope: head Ø33.32 mm (A max 1.312 in) x 22.22 mm (H max 0.875 in), hex socket 3/4 in across flats x 0.432 in deep (key engagement min), plain Ø22.225 mm shank (D max), example length under the head 2.0 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  },
  {
   "file": "shcs-1-8x50.8mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-1-8x50.8mm.step",
   "stl": "https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/shcs-1-8x50.8mm.stl",
   "note": "1 socket head cap screw envelope: head Ø38.10 mm (A max 1.500 in) x 25.40 mm (H max 1.000 in), hex socket 3/4 in across flats x 0.495 in deep (key engagement min), plain Ø25.400 mm shank (D max), example length under the head 2.0 in (Xem's choice); no thread, top chamfer, fillet or socket cone"
  }
 ],
 "markdown": "https://xemstudio.com/objects/socket-head-cap-screws-inch-full/index.md"
}