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 Source: Xem Studio, https://xemstudio.com/objects/socket-head-cap-screws-inch-full/ (sheet CC BY 4.0) 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 Catalog version: 2026-10-20 Overall (mm): length 50.8, width 38.1, height 76.2 - 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. 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) #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 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - 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 - 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 - 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 - 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/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 18 parts): https://xemstudio.com/files/hardware/socket-head-cap-screws-inch-full/index.json API: https://xemstudio.com/api/geometry?object=socket-head-cap-screws-inch-full