{
 "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": "self-drilling-screws-din-7504-heads",
 "name": "Self-drilling screws DIN 7504: hexagon washer head (type K) and pan / countersunk heads (N, P), ST2.2–ST6.3: head diameter, height, drill-point diameter, drilling depth",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What are the hex washer head dimensions (across flats, washer diameter, height) of an ST4.8 or ST5.5 self-drilling screw, and how thick a sheet does it drill?",
 "tags": [
  "din 7504",
  "self drilling screw",
  "hex washer head screw",
  "tek screw metric",
  "st4.8 screw",
  "st5.5 screw",
  "st6.3 screw",
  "roofing screw",
  "drill point screw",
  "tool"
 ],
 "aliases": [
  "din 7504 dimensions",
  "st4.8 hex washer head dimensions",
  "st5.5 self drilling screw head",
  "st6.3 hex washer head across flats",
  "din 7504 k head diameter",
  "self drilling screw 4.8 mm head",
  "st4.2 self drilling screw head size",
  "din 7504 drilling depth",
  "st5.5 drilling capacity",
  "din 7504 type n",
  "hex washer head screw wrench size 8 mm"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/self-drilling-screws-din-7504-heads/",
 "sheet_txt": "https://xemstudio.com/objects/self-drilling-screws-din-7504-heads/sheet.txt",
 "sheet": {
  "basis": "fasten.it's DIN 7504 tables (09/1995, now cancelled): types K, N and P with the page's own column letters; numbers only",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Millimetres. DIN 7504 is the (cancelled) standard for self-drilling tapping screws; fasten.it still prints it. Sizes ST2.2 to ST6.3. The page does not define its column letters, so none is interpreted beyond the names the page gives. For type K (hexagon washer head) the columns are P (pitch), h min, k (max / min), dc (min – max), s (min – max) and dp max; read from the shape of the head, dc is the washer diameter and s the hexagon width across flats, but the page does not say so. Types N and P print k and dk (min – max) and dp max; type R is printed identically to P; type L (hex head with slot) was read too and is not tabulated.",
   "'Drilling depth, from – to' is printed as a row of seven value pairs without clear column alignment; the pairs were matched to ST2.9, 3.5, 3.9, 4.2, 4.8, 5.5, 6.3 in the order printed, so treat that column as read in order, not as a verified table. The page's heading for the block is 'Drilling depth (sheet, plate, thickness)' with a drill-point figure; the numbers are not interpreted further. The standard's minimum grip length (lg) table is printed without headers and is not used.",
   "Compare with the drilling ranges makers print for inch Tek points on tek-self-drilling-screw-drill-points: the two sets are not the same measure and are not converted.",
   "No file: head chamfers, washer face, drill-flute and thread geometry are not published as numbers on the page; a drawing from k, dc and s alone would be an invented shape."
  ],
  "table": {
   "columns": [
    "head type",
    "thread",
    "P",
    "k (max / min)",
    "dc or dk (min – max)",
    "s (min – max; reads as width across flats)",
    "h min",
    "dp max",
    "drilling depth from – to (mm, read in order)"
   ],
   "rows": [
    [
     "Type K (hexagon washer head)",
     "ST2.9",
     "1.1",
     "k 2.8 / 2.5",
     "dc 5.8 – 6.3",
     "s 3.82 – 4",
     "h min 0.4",
     "dp max 2.3",
     "0.7 – 1.9"
    ],
    [
     "Type K (hexagon washer head)",
     "ST3.5",
     "1.3",
     "k 3.4 / 3",
     "dc 7.6 – 8.3",
     "s 5.32 – 5.5",
     "h min 0.6",
     "dp max 2.8",
     "0.7 – 2.25"
    ],
    [
     "Type K (hexagon washer head)",
     "ST3.9",
     "1.3",
     "k 3.4 / 3",
     "dc 7.6 – 8.3",
     "s 5.32 – 5.5",
     "h min 0.6",
     "dp max 3.1",
     "0.7 – 2.4"
    ],
    [
     "Type K (hexagon washer head)",
     "ST4.2",
     "1.4",
     "k 4.1 / 3.6",
     "dc 8.1 – 8.8",
     "s 6.78 – 7",
     "h min 0.8",
     "dp max 3.6",
     "1.75 – 3"
    ],
    [
     "Type K (hexagon washer head)",
     "ST4.8",
     "1.6",
     "k 4.3 / 3.8",
     "dc 9.8 – 10.5",
     "s 7.78 – 8",
     "h min 0.9",
     "dp max 4.1",
     "1.75 – 4.4"
    ],
    [
     "Type K (hexagon washer head)",
     "ST5.5",
     "1.8",
     "k 5.4 / 4.8",
     "dc 10 – 11",
     "s 7.78 – 8",
     "h min 1",
     "dp max 4.8",
     "1.75 – 5.25"
    ],
    [
     "Type K (hexagon washer head)",
     "ST6.3",
     "1.8",
     "k 5.9 / 5.3",
     "dc 12.2 – 13.5",
     "s 9.78 – 10",
     "h min 1",
     "dp max 5.8",
     "2 – 6"
    ],
    [
     "Type N",
     "ST2.2",
     "0.8",
     "k 1.6 / 1.4",
     "dk 3.7 – 4",
     "—",
     "—",
     "dp max 2.3",
     "—"
    ],
    [
     "Type N",
     "ST2.9",
     "1.1",
     "k 2.4 / 2.15",
     "dk 5.3 – 5.6",
     "—",
     "—",
     "dp max 2.8",
     "0.7 – 1.9"
    ],
    [
     "Type N",
     "ST3.5",
     "1.3",
     "k 2.6 / 2.35",
     "dk 6.64 – 7",
     "—",
     "—",
     "dp max 3.1",
     "0.7 – 2.25"
    ],
    [
     "Type N",
     "ST4.2",
     "1.4",
     "k 3.1 / 2.8",
     "dk 7.64 – 8",
     "—",
     "—",
     "dp max 3.6",
     "1.75 – 3"
    ],
    [
     "Type N",
     "ST4.8",
     "1.6",
     "k 3.7 / 3.4",
     "dk 9.14 – 9.5",
     "—",
     "—",
     "dp max 4.1",
     "1.75 – 4.4"
    ],
    [
     "Type N",
     "ST5.5",
     "1.8",
     "k 4 / 3.7",
     "dk 10.57 – 11",
     "—",
     "—",
     "dp max 4.8",
     "1.75 – 5.25"
    ],
    [
     "Type N",
     "ST6.3",
     "1.8",
     "k 4.6 / 4.3",
     "dk 11.57 – 12",
     "—",
     "—",
     "dp max 5.8",
     "2 – 6"
    ],
    [
     "Type P (also type R, identical table)",
     "ST2.2",
     "0.8",
     "k max 1.1",
     "dk 3.5 – 3.8",
     "—",
     "—",
     "dp max 2.3",
     "—"
    ],
    [
     "Type P (also type R, identical table)",
     "ST2.9",
     "1.1",
     "k max 1.7",
     "dk 5.2 – 5.5",
     "—",
     "—",
     "dp max 2.8",
     "0.7 – 1.9"
    ],
    [
     "Type P (also type R, identical table)",
     "ST3.5",
     "1.3",
     "k max 2.35",
     "dk 6.9 – 7.3",
     "—",
     "—",
     "dp max 3.1",
     "0.7 – 2.25"
    ],
    [
     "Type P (also type R, identical table)",
     "ST4.2",
     "1.4",
     "k max 2.6",
     "dk 8 – 8.4",
     "—",
     "—",
     "dp max 3.6",
     "1.75 – 3"
    ],
    [
     "Type P (also type R, identical table)",
     "ST4.8",
     "1.6",
     "k max 2.8",
     "dk 8.9 – 9.3",
     "—",
     "—",
     "dp max 4.1",
     "1.75 – 4.4"
    ],
    [
     "Type P (also type R, identical table)",
     "ST5.5",
     "1.8",
     "k max 3",
     "dk 9.9 – 10.3",
     "—",
     "—",
     "dp max 4.8",
     "1.75 – 5.25"
    ],
    [
     "Type P (also type R, identical table)",
     "ST6.3",
     "1.8",
     "k max 3.15",
     "dk 10.9 – 11.3",
     "—",
     "—",
     "dp max 5.8",
     "2 – 6"
    ]
   ]
  }
 },
 "sheet_text": "Self-drilling screws DIN 7504: hexagon washer head (type K) and pan / countersunk heads (N, P), ST2.2–ST6.3: head diameter, height, drill-point diameter, drilling depth — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/self-drilling-screws-din-7504-heads/  (sheet CC BY 4.0)\nBasis: fasten.it's DIN 7504 tables (09/1995, now cancelled): types K, N and P with the page's own column letters; numbers only\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Millimetres. DIN 7504 is the (cancelled) standard for self-drilling tapping screws; fasten.it still prints it. Sizes ST2.2 to ST6.3. The page does not define its column letters, so none is interpreted beyond the names the page gives. For type K (hexagon washer head) the columns are P (pitch), h min, k (max / min), dc (min – max), s (min – max) and dp max; read from the shape of the head, dc is the washer diameter and s the hexagon width across flats, but the page does not say so. Types N and P print k and dk (min – max) and dp max; type R is printed identically to P; type L (hex head with slot) was read too and is not tabulated.\n- 'Drilling depth, from – to' is printed as a row of seven value pairs without clear column alignment; the pairs were matched to ST2.9, 3.5, 3.9, 4.2, 4.8, 5.5, 6.3 in the order printed, so treat that column as read in order, not as a verified table. The page's heading for the block is 'Drilling depth (sheet, plate, thickness)' with a drill-point figure; the numbers are not interpreted further. The standard's minimum grip length (lg) table is printed without headers and is not used.\n- Compare with the drilling ranges makers print for inch Tek points on tek-self-drilling-screw-drill-points: the two sets are not the same measure and are not converted.\n- No file: head chamfers, washer face, drill-flute and thread geometry are not published as numbers on the page; a drawing from k, dc and s alone would be an invented shape.\n\nhead type  thread  P  k (max / min)  dc or dk (min – max)  s (min – max; reads as width across flats)  h min  dp max  drilling depth from – to (mm, read in order)\nType K (hexagon washer head)  ST2.9  1.1  k 2.8 / 2.5  dc 5.8 – 6.3  s 3.82 – 4  h min 0.4  dp max 2.3  0.7 – 1.9\nType K (hexagon washer head)  ST3.5  1.3  k 3.4 / 3  dc 7.6 – 8.3  s 5.32 – 5.5  h min 0.6  dp max 2.8  0.7 – 2.25\nType K (hexagon washer head)  ST3.9  1.3  k 3.4 / 3  dc 7.6 – 8.3  s 5.32 – 5.5  h min 0.6  dp max 3.1  0.7 – 2.4\nType K (hexagon washer head)  ST4.2  1.4  k 4.1 / 3.6  dc 8.1 – 8.8  s 6.78 – 7  h min 0.8  dp max 3.6  1.75 – 3\nType K (hexagon washer head)  ST4.8  1.6  k 4.3 / 3.8  dc 9.8 – 10.5  s 7.78 – 8  h min 0.9  dp max 4.1  1.75 – 4.4\nType K (hexagon washer head)  ST5.5  1.8  k 5.4 / 4.8  dc 10 – 11  s 7.78 – 8  h min 1  dp max 4.8  1.75 – 5.25\nType K (hexagon washer head)  ST6.3  1.8  k 5.9 / 5.3  dc 12.2 – 13.5  s 9.78 – 10  h min 1  dp max 5.8  2 – 6\nType N  ST2.2  0.8  k 1.6 / 1.4  dk 3.7 – 4  —  —  dp max 2.3  —\nType N  ST2.9  1.1  k 2.4 / 2.15  dk 5.3 – 5.6  —  —  dp max 2.8  0.7 – 1.9\nType N  ST3.5  1.3  k 2.6 / 2.35  dk 6.64 – 7  —  —  dp max 3.1  0.7 – 2.25\nType N  ST4.2  1.4  k 3.1 / 2.8  dk 7.64 – 8  —  —  dp max 3.6  1.75 – 3\nType N  ST4.8  1.6  k 3.7 / 3.4  dk 9.14 – 9.5  —  —  dp max 4.1  1.75 – 4.4\nType N  ST5.5  1.8  k 4 / 3.7  dk 10.57 – 11  —  —  dp max 4.8  1.75 – 5.25\nType N  ST6.3  1.8  k 4.6 / 4.3  dk 11.57 – 12  —  —  dp max 5.8  2 – 6\nType P (also type R, identical table)  ST2.2  0.8  k max 1.1  dk 3.5 – 3.8  —  —  dp max 2.3  —\nType P (also type R, identical table)  ST2.9  1.1  k max 1.7  dk 5.2 – 5.5  —  —  dp max 2.8  0.7 – 1.9\nType P (also type R, identical table)  ST3.5  1.3  k max 2.35  dk 6.9 – 7.3  —  —  dp max 3.1  0.7 – 2.25\nType P (also type R, identical table)  ST4.2  1.4  k max 2.6  dk 8 – 8.4  —  —  dp max 3.6  1.75 – 3\nType P (also type R, identical table)  ST4.8  1.6  k max 2.8  dk 8.9 – 9.3  —  —  dp max 4.1  1.75 – 4.4\nType P (also type R, identical table)  ST5.5  1.8  k max 3  dk 9.9 – 10.3  —  —  dp max 4.8  1.75 – 5.25\nType P (also type R, identical table)  ST6.3  1.8  k max 3.15  dk 10.9 – 11.3  —  —  dp max 5.8  2 – 6\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- fasten.it: DIN 7504 self-drilling tapping screws, 09/1995 (cancelled): types K (hexagon washer head), L, N, P, R; ST2.2 to ST6.3: P, h, k, dc, s, dk, dp and drilling depth — web — Reference page; numbers only. The page does not define the column letters — https://fasten.it/en/norms/norm/din_7504\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=self-drilling-screws-din-7504-heads\n",
 "sources": [
  {
   "publisher": "fasten.it",
   "title": "DIN 7504 self-drilling tapping screws, 09/1995 (cancelled): types K (hexagon washer head), L, N, P, R; ST2.2 to ST6.3: P, h, k, dc, s, dk, dp and drilling depth",
   "url": "https://fasten.it/en/norms/norm/din_7504",
   "formats": [
    "web"
   ],
   "license": "Reference page; numbers only. The page does not define the column letters",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tek-self-drilling-screw-drill-points",
  "self-tapping-screws-iso-7049-pan-head",
  "sheet-metal-screw-pilot-holes",
  "hex-head-screws-metric",
  "plastic-thread-forming-screw-holes"
 ],
 "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": [],
 "faq": [
  {
   "q": "What is the width across flats of an ST4.8 hex washer head self-drilling screw?",
   "a": "DIN 7504 type K: the s column is 7.78 – 8 mm for ST4.8 (and ST5.5), the washer column dc 9.8 – 10.5 mm, height k 4.3 max / 3.8 min."
  },
  {
   "q": "How thick a sheet does an ST5.5 self-drilling screw drill?",
   "a": "The page's drilling-depth row, read in order, gives 1.75 – 5.25 mm for ST5.5 (matched by position, not by column header)."
  },
  {
   "q": "Is DIN 7504 still current?",
   "a": "fasten.it marks the 09/1995 edition as cancelled; the page remains a useful size table."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/self-drilling-screws-din-7504-heads/index.md"
}