{
 "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": "ribbed-plastic-expansion-anchors",
 "name": "Ribbed plastic expansion anchors (wall plugs): drill size, length and screw range",
 "kind": "standard",
 "category": "Hardware",
 "group": "Fasteners",
 "year": null,
 "question": "What drill bit and screw size does a ribbed plastic expansion anchor (wall plug) need?",
 "tags": [
  "fastener",
  "anchor",
  "wall plug",
  "expansion anchor",
  "plastic anchor",
  "drywall",
  "mount",
  "bracket",
  "tool"
 ],
 "aliases": [
  "wall plug sizes",
  "ribbed plastic anchor drill size",
  "plastic expansion anchor dimensions",
  "fischer sx plus",
  "rawlplug uno",
  "6mm wall plug drill bit",
  "8mm wall plug",
  "ribbed anchor screw size",
  "drywall anchor sizes",
  "pop in anchor"
 ],
 "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/ribbed-plastic-expansion-anchors/",
 "sheet_txt": "https://xemstudio.com/objects/ribbed-plastic-expansion-anchors/sheet.txt",
 "sheet": {
  "basis": "fischer SX Plus article table and Rawlplug UNO datasheet. Neither maker prints rib geometry, a collar diameter or a wall-thickness range, so no file",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "A ribbed plastic expansion anchor is a plug with ribs along its body: you drill a hole of the plug's diameter, push the plug in and drive a screw that spreads it against the hole wall. Tables below are two makers' published sizes (mm, inch in brackets, computed as mm / 25.4).",
   "Drill size d0 equals the plug diameter in both makers' tables (a 6 mm plug takes a 6 mm hole). The hole must be deeper than the plug: the maker's minimum drill depth (h1 / h0) is the plug length plus 10 mm for every Rawlplug UNO size and for fischer SX Plus up to 8 × 65, and plus 20 mm for SX Plus 10 × 50 and 12 × 60.",
   "The screw range is the thread diameter the maker prints for that plug (wood or chipboard screw). Rawlplug prints one diameter per pack, so some sizes show a single value.",
   "Not published and therefore not on this page: rib or fin dimensions, collar (flange) diameter, and a plasterboard or wall thickness range. These plugs are specified for the substrate depth of the hole, not the panel thickness; for thin panels see the plywood and drywall page and use a hollow-wall anchor."
  ],
  "table": {
   "columns": [
    "maker / series",
    "size (plug mm × length mm)",
    "drill d0, mm (in)",
    "min. hole depth, mm (in)",
    "plug length, mm (in)",
    "screw diameter, mm"
   ],
   "rows": [
    [
     "fischer SX Plus",
     "4 × 20",
     "4 (0.157)",
     "30 (1.181)",
     "20 (0.787)",
     "2.0 – 3.0"
    ],
    [
     "fischer SX Plus",
     "5 × 25",
     "5 (0.197)",
     "35 (1.378)",
     "25 (0.984)",
     "3.0 – 4.0"
    ],
    [
     "fischer SX Plus",
     "6 × 30",
     "6 (0.236)",
     "40 (1.575)",
     "30 (1.181)",
     "4.0 – 5.0"
    ],
    [
     "fischer SX Plus",
     "6 × 50",
     "6 (0.236)",
     "60 (2.362)",
     "50 (1.969)",
     "4.0 – 5.0"
    ],
    [
     "fischer SX Plus",
     "8 × 40",
     "8 (0.315)",
     "50 (1.969)",
     "40 (1.575)",
     "4.5 – 6.0"
    ],
    [
     "fischer SX Plus",
     "8 × 65",
     "8 (0.315)",
     "75 (2.953)",
     "65 (2.559)",
     "4.5 – 6.0"
    ],
    [
     "fischer SX Plus",
     "10 × 50",
     "10 (0.394)",
     "70 (2.756)",
     "50 (1.969)",
     "6.0 – 8.0"
    ],
    [
     "fischer SX Plus",
     "12 × 60",
     "12 (0.472)",
     "80 (3.15)",
     "60 (2.362)",
     "8.0 – 10.0"
    ],
    [
     "Rawlplug UNO",
     "Ø5",
     "5 (0.197)",
     "34 (1.339)",
     "24 (0.945)",
     "3.5"
    ],
    [
     "Rawlplug UNO",
     "Ø6",
     "6 (0.236)",
     "38 (1.496)",
     "28 (1.102)",
     "4.0"
    ],
    [
     "Rawlplug UNO",
     "Ø8",
     "8 (0.315)",
     "42 (1.654)",
     "32 (1.26)",
     "4.5 – 5.0"
    ],
    [
     "Rawlplug UNO",
     "Ø10",
     "10 (0.394)",
     "46 (1.811)",
     "36 (1.417)",
     "5.0 – 6.0"
    ]
   ]
  }
 },
 "sheet_text": "Ribbed plastic expansion anchors (wall plugs): drill size, length and screw range — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/ribbed-plastic-expansion-anchors/  (sheet CC BY 4.0)\nBasis: fischer SX Plus article table and Rawlplug UNO datasheet. Neither maker prints rib geometry, a collar diameter or a wall-thickness range, so no file\nCatalog version: 2026-10-20\n\nSizes: see table below\n- A ribbed plastic expansion anchor is a plug with ribs along its body: you drill a hole of the plug's diameter, push the plug in and drive a screw that spreads it against the hole wall. Tables below are two makers' published sizes (mm, inch in brackets, computed as mm / 25.4).\n- Drill size d0 equals the plug diameter in both makers' tables (a 6 mm plug takes a 6 mm hole). The hole must be deeper than the plug: the maker's minimum drill depth (h1 / h0) is the plug length plus 10 mm for every Rawlplug UNO size and for fischer SX Plus up to 8 × 65, and plus 20 mm for SX Plus 10 × 50 and 12 × 60.\n- The screw range is the thread diameter the maker prints for that plug (wood or chipboard screw). Rawlplug prints one diameter per pack, so some sizes show a single value.\n- Not published and therefore not on this page: rib or fin dimensions, collar (flange) diameter, and a plasterboard or wall thickness range. These plugs are specified for the substrate depth of the hole, not the panel thickness; for thin panels see the plywood and drywall page and use a hollow-wall anchor.\n\nmaker / series  size (plug mm × length mm)  drill d0, mm (in)  min. hole depth, mm (in)  plug length, mm (in)  screw diameter, mm\nfischer SX Plus  4 × 20  4 (0.157)  30 (1.181)  20 (0.787)  2.0 – 3.0\nfischer SX Plus  5 × 25  5 (0.197)  35 (1.378)  25 (0.984)  3.0 – 4.0\nfischer SX Plus  6 × 30  6 (0.236)  40 (1.575)  30 (1.181)  4.0 – 5.0\nfischer SX Plus  6 × 50  6 (0.236)  60 (2.362)  50 (1.969)  4.0 – 5.0\nfischer SX Plus  8 × 40  8 (0.315)  50 (1.969)  40 (1.575)  4.5 – 6.0\nfischer SX Plus  8 × 65  8 (0.315)  75 (2.953)  65 (2.559)  4.5 – 6.0\nfischer SX Plus  10 × 50  10 (0.394)  70 (2.756)  50 (1.969)  6.0 – 8.0\nfischer SX Plus  12 × 60  12 (0.472)  80 (3.15)  60 (2.362)  8.0 – 10.0\nRawlplug UNO  Ø5  5 (0.197)  34 (1.339)  24 (0.945)  3.5\nRawlplug UNO  Ø6  6 (0.236)  38 (1.496)  28 (1.102)  4.0\nRawlplug UNO  Ø8  8 (0.315)  42 (1.654)  32 (1.26)  4.5 – 5.0\nRawlplug UNO  Ø10  10 (0.394)  46 (1.811)  36 (1.417)  5.0 – 6.0\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- fischer: Expansion plug SX Plus: article table (drill diameter d0, min. drill hole depth h1, anchor length l, screw diameter ds) — web — Publisher's page; dimensions are facts — https://www.fischer.co.uk/en-gb/products/standard-fixings/plastic-fixings/expansion-plug-sx-plus\n- Rawlplug: UNO Universal Plug with Screw: product information and installation data (d, l, D, d0, h0) — web — Maker datasheet, hosted by a distributor; numbers only — https://static.chipdip.ru/lib/417/DOC025417841.pdf\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=ribbed-plastic-expansion-anchors\n",
 "sources": [
  {
   "publisher": "fischer",
   "title": "Expansion plug SX Plus: article table (drill diameter d0, min. drill hole depth h1, anchor length l, screw diameter ds)",
   "url": "https://www.fischer.co.uk/en-gb/products/standard-fixings/plastic-fixings/expansion-plug-sx-plus",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rawlplug",
   "title": "UNO Universal Plug with Screw: product information and installation data (d, l, D, d0, h0)",
   "url": "https://static.chipdip.ru/lib/417/DOC025417841.pdf",
   "formats": [
    "web"
   ],
   "license": "Maker datasheet, hosted by a distributor; numbers only",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "plywood-and-drywall"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. 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.",
 "mating": [],
 "faq": [
  {
   "q": "Which drill bit for a ribbed plastic expansion anchor?",
   "a": "The bit equals the plug diameter: 5, 6, 8, 10 mm (0.197, 0.236, 0.315, 0.394 in) for the sizes above; 4 mm for fischer SX Plus 4 × 20 and 12 mm for 12 × 60."
  },
  {
   "q": "What wall thickness do these plugs need?",
   "a": "Neither maker prints a wall or panel thickness range. The published figure is the minimum drill hole depth, which is the plug length plus 10 mm (plus 20 mm for fischer 10 × 50 and 12 × 60)."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/ribbed-plastic-expansion-anchors/index.md"
}