{ "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": "large-washers-din-9021-iso-7093", "name": "Large (fender) washers, DIN 9021 / ISO 7093: M2.5–M36 bore, outside diameter, thickness + nylon variant + 8 washer files", "kind": "standard", "category": "Hardware", "group": "Fasteners", "year": null, "question": "What are the dimensions of a DIN 9021 large washer, and what size is an M8 fender washer?", "tags": [ "fender washer", "large washer", "din 9021", "iso 7093", "body work washer", "panel washer", "oversized washer", "nylon washer", "fastener" ], "aliases": [ "din 9021 washer dimensions", "m8 fender washer size", "m6 large washer outside diameter", "iso 7093 washer", "m5 fender washer dimensions", "din 9021 m10", "large od washer m8 24 mm", "nylon washer m6 din 9021", "fender washer metric size chart", "m4 large washer 12 mm", "din 9021 washer stl step" ], "overall_mm": { "length": 50, "width": 50, "height": 3 }, "official_cad": false, "xem_status": "free-files", "les": false, "free_files": 8, "url": "https://xemstudio.com/objects/large-washers-din-9021-iso-7093/", "sheet_txt": "https://xemstudio.com/objects/large-washers-din-9021-iso-7093/sheet.txt", "sheet": { "basis": "Westfield Fasteners' DIN 9021 table, checked against fasteners.eu's DIN 9021 page (same d1, d2, h on every size) and JC Fasteners' nylon sheet; eight washer files", "overall_mm": { "length": 50, "width": 50, "height": 3 }, "notes": [ "DIN 9021 is the plain washer with an outside diameter of about 3 d (fender washer, body-work washer, large-OD washer, 'panel washer'). Columns: bore d1 (nominal = minimum, then maximum), outside d2 (nominal = maximum, then minimum), thickness h (nominal, maximum, minimum), all mm. Westfield and fasteners.eu print identical d1, d2 and h for every size M2.5 to M36. Westfield cites DIN 9021 and ISO 7093; fasteners.eu names DIN EN ISO 7093-1 as the current norm. The ISO 7093-1 text itself was not read, so equality of every figure with ISO 7093-1 is not asserted here.", "The nylon row set: JC Fasteners' nylon DIN 9021 sheet prints the same d1, d2 and h as the steel rows for every size M2.5 to M36, and adds an M2 row (bore 2.2 / 2.34, outside 7 / 6.64, h 0.8 / 0.9 / 0.7), which is the only extra row shown. Its M36 minimum thickness (8.00) disagrees with its own nominal and the steel tables (6.8), so that value is dropped; its service-temperature figure looked like a typo and is not used. Nylon washers to other standards (flat polyamide washers, DIN 125 style) were not verified from a table and are not listed.", "Files are Xem-drawn flat annuli at the nominal published sizes (bore = d1 nominal, outside = d2 nominal, thickness = h nominal) for M3, M4, M5, M6, M8, M10, M12 and M16. Edge radii and tolerances are not modelled. A bolt of the thread size passes through the bore with the d1 clearance. Plain flat washers: flat-washers-metric, flat-washers-metric-m10-m24, flat-washers-iso-7090-m5-m64.", "McMaster-Carr sells oversized flat washers with per-part STEP; its large-diameter washer category is linked, not copied." ], "table": { "columns": [ "standard", "thread", "d1 nom = min", "d1 max", "d2 nom = max", "d2 min", "h nom", "h max", "h min" ], "rows": [ [ "DIN 9021 steel", "M2.5", "2.7", "2.84", "8", "7.64", "0.8", "0.9", "0.7" ], [ "DIN 9021 steel", "M3", "3.2", "3.38", "9", "8.64", "0.8", "0.9", "0.7" ], [ "DIN 9021 steel", "M3.5", "3.7", "3.88", "11", "10.57", "0.8", "0.9", "0.7" ], [ "DIN 9021 steel", "M4", "4.3", "4.48", "12", "11.57", "1", "1.1", "0.9" ], [ "DIN 9021 steel", "M5", "5.3", "5.48", "15", "14.57", "1.2", "1.4", "1" ], [ "DIN 9021 steel", "M6", "6.4", "6.62", "18", "17.57", "1.6", "1.8", "1.4" ], [ "DIN 9021 steel", "M7", "7.4", "7.62", "22", "21.48", "2", "2.2", "1.8" ], [ "DIN 9021 steel", "M8", "8.4", "8.62", "24", "23.48", "2", "2.2", "1.8" ], [ "DIN 9021 steel", "M10", "10.5", "10.77", "30", "29.48", "2.5", "2.7", "2.3" ], [ "DIN 9021 steel", "M12", "13", "13.27", "37", "36.38", "3", "3.3", "2.7" ], [ "DIN 9021 steel", "M14", "15", "15.27", "44", "43.38", "3", "3.3", "2.7" ], [ "DIN 9021 steel", "M16", "17", "17.27", "50", "49.38", "3", "3.3", "2.7" ], [ "DIN 9021 steel", "M18", "20", "20.52", "56", "54.1", "4", "4.6", "3.4" ], [ "DIN 9021 steel", "M20", "22", "22.52", "60", "58.1", "4", "4.6", "3.4" ], [ "DIN 9021 steel", "M24", "26", "26.84", "72", "70.1", "5", "6", "4" ], [ "DIN 9021 steel", "M30", "33", "34", "92", "89.8", "6", "7", "5" ], [ "DIN 9021 steel", "M36", "39", "40", "110", "107.8", "8", "9.2", "6.8" ], [ "DIN 9021 nylon (JC Fasteners)", "M2", "2.2", "2.34", "7", "6.64", "0.8", "0.9", "0.7" ] ] } }, "sheet_text": "Large (fender) washers, DIN 9021 / ISO 7093: M2.5–M36 bore, outside diameter, thickness + nylon variant + 8 washer files — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/large-washers-din-9021-iso-7093/ (sheet CC BY 4.0)\nBasis: Westfield Fasteners' DIN 9021 table, checked against fasteners.eu's DIN 9021 page (same d1, d2, h on every size) and JC Fasteners' nylon sheet; eight washer files\nCatalog version: 2026-10-20\n\nOverall (mm): length 50.0, width 50.0, height 3.0\n- DIN 9021 is the plain washer with an outside diameter of about 3 d (fender washer, body-work washer, large-OD washer, 'panel washer'). Columns: bore d1 (nominal = minimum, then maximum), outside d2 (nominal = maximum, then minimum), thickness h (nominal, maximum, minimum), all mm. Westfield and fasteners.eu print identical d1, d2 and h for every size M2.5 to M36. Westfield cites DIN 9021 and ISO 7093; fasteners.eu names DIN EN ISO 7093-1 as the current norm. The ISO 7093-1 text itself was not read, so equality of every figure with ISO 7093-1 is not asserted here.\n- The nylon row set: JC Fasteners' nylon DIN 9021 sheet prints the same d1, d2 and h as the steel rows for every size M2.5 to M36, and adds an M2 row (bore 2.2 / 2.34, outside 7 / 6.64, h 0.8 / 0.9 / 0.7), which is the only extra row shown. Its M36 minimum thickness (8.00) disagrees with its own nominal and the steel tables (6.8), so that value is dropped; its service-temperature figure looked like a typo and is not used. Nylon washers to other standards (flat polyamide washers, DIN 125 style) were not verified from a table and are not listed.\n- Files are Xem-drawn flat annuli at the nominal published sizes (bore = d1 nominal, outside = d2 nominal, thickness = h nominal) for M3, M4, M5, M6, M8, M10, M12 and M16. Edge radii and tolerances are not modelled. A bolt of the thread size passes through the bore with the d1 clearance. Plain flat washers: flat-washers-metric, flat-washers-metric-m10-m24, flat-washers-iso-7090-m5-m64.\n- McMaster-Carr sells oversized flat washers with per-part STEP; its large-diameter washer category is linked, not copied.\n\nstandard thread d1 nom = min d1 max d2 nom = max d2 min h nom h max h min\nDIN 9021 steel M2.5 2.7 2.84 8 7.64 0.8 0.9 0.7\nDIN 9021 steel M3 3.2 3.38 9 8.64 0.8 0.9 0.7\nDIN 9021 steel M3.5 3.7 3.88 11 10.57 0.8 0.9 0.7\nDIN 9021 steel M4 4.3 4.48 12 11.57 1 1.1 0.9\nDIN 9021 steel M5 5.3 5.48 15 14.57 1.2 1.4 1\nDIN 9021 steel M6 6.4 6.62 18 17.57 1.6 1.8 1.4\nDIN 9021 steel M7 7.4 7.62 22 21.48 2 2.2 1.8\nDIN 9021 steel M8 8.4 8.62 24 23.48 2 2.2 1.8\nDIN 9021 steel M10 10.5 10.77 30 29.48 2.5 2.7 2.3\nDIN 9021 steel M12 13 13.27 37 36.38 3 3.3 2.7\nDIN 9021 steel M14 15 15.27 44 43.38 3 3.3 2.7\nDIN 9021 steel M16 17 17.27 50 49.38 3 3.3 2.7\nDIN 9021 steel M18 20 20.52 56 54.1 4 4.6 3.4\nDIN 9021 steel M20 22 22.52 60 58.1 4 4.6 3.4\nDIN 9021 steel M24 26 26.84 72 70.1 5 6 4\nDIN 9021 steel M30 33 34 92 89.8 6 7 5\nDIN 9021 steel M36 39 40 110 107.8 8 9.2 6.8\nDIN 9021 nylon (JC Fasteners) M2 2.2 2.34 7 6.64 0.8 0.9 0.7\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Westfield Fasteners: Washers with large outside diameter, DIN 9021 (cites ISO 7093): d1 min / max, d2 max / min, h nom / max / min, M2.5 to M36 — web — Publisher's page; dimensions are facts — https://www.westfieldfasteners.co.uk/Standards/Washer-od3nom-M.pdf\n- fasteners.eu: DIN 9021 plain washer, outer diameter about 3 d (current norm DIN EN ISO 7093-1): d1, d2, h, weight — web — Publisher's page; dimensions are facts — https://www.fasteners.eu/standards/din/9021/\n- JC Fasteners: DIN 9021 large washer, nylon: d1, d2, h by size, M2 to M36 — web — Maker data sheet; numbers only — https://www.jcfasteners.com/wp-content/uploads/DIN-9021-Washer-Large-K3D03-NYLON.pdf\n- McMaster-Carr: Large-diameter washers (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/large-diameter-washers\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 8 parts): https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/index.json\nAPI: https://xemstudio.com/api/geometry?object=large-washers-din-9021-iso-7093\n", "sources": [ { "publisher": "Westfield Fasteners", "title": "Washers with large outside diameter, DIN 9021 (cites ISO 7093): d1 min / max, d2 max / min, h nom / max / min, M2.5 to M36", "url": "https://www.westfieldfasteners.co.uk/Standards/Washer-od3nom-M.pdf", "formats": [ "web" ], "license": "Publisher's page; dimensions are facts", "license_verified": true, "hosted": false }, { "publisher": "fasteners.eu", "title": "DIN 9021 plain washer, outer diameter about 3 d (current norm DIN EN ISO 7093-1): d1, d2, h, weight", "url": "https://www.fasteners.eu/standards/din/9021/", "formats": [ "web" ], "license": "Publisher's page; dimensions are facts", "license_verified": true, "hosted": false }, { "publisher": "JC Fasteners", "title": "DIN 9021 large washer, nylon: d1, d2, h by size, M2 to M36", "url": "https://www.jcfasteners.com/wp-content/uploads/DIN-9021-Washer-Large-K3D03-NYLON.pdf", "formats": [ "web" ], "license": "Maker data sheet; numbers only", "license_verified": true, "hosted": false }, { "publisher": "McMaster-Carr", "title": "Large-diameter washers (free STEP/IGES per part, for your own design use; no redistribution)", "url": "https://www.mcmaster.com/large-diameter-washers", "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": [ "flat-washers-metric", "flat-washers-metric-m10-m24", "flat-washers-iso-7090-m5-m64", "spring-lock-washers-din-127-b", "serrated-lock-washers-din-6798", "hex-nuts-metric" ], "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": "bore (d1)", "exact": "M3 3.2, M4 4.3, M5 5.3, M6 6.4, M8 8.4, M10 10.5, M12 13, M16 17 mm (nominal = minimum)", "mates": "screw / bolt of the thread size; plain cylinder at the thread major diameter", "fit": "designed", "files": "washer-din-9021-" }, { "feature": "outside (d2)", "exact": "M3 9, M4 12, M5 15, M6 18, M8 24, M10 30, M12 37, M16 50 mm (nominal = maximum)", "mates": "round counterbore or boss that seats the washer: Ø = d2 + your process clearance", "fit": "slide", "files": "washer-din-9021-" }, { "feature": "thickness (h)", "exact": "0.8, 1, 1.2, 1.6, 2, 2.5, 3, 3 mm nominal for M3 to M16", "mates": "recess depth under the washer", "fit": "designed", "files": "washer-din-9021-" } ], "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 outside diameter of an M8 DIN 9021 washer?", "a": "24 mm (maximum, nominal), 23.48 mm minimum; bore 8.4 mm, thickness 2 mm nominal (1.8 to 2.2)." }, { "q": "What is the difference between DIN 9021 and DIN 125?", "a": "DIN 9021 has an outside diameter of about 3 d (M8: 24 mm); a normal ISO 7089 / DIN 125 washer is about 2 d (M8: 16 mm). Thickness is also bigger: 2 mm against 1.6 mm at M8." }, { "q": "Is a DIN 9021 washer the same as ISO 7093?", "a": "Westfield's table cites both and fasteners.eu names DIN EN ISO 7093-1 as the current norm; the ISO text was not read, so check ISO 7093-1 for tolerance classes." } ], "files_license": null, "offers": [ { "file": "washer-din-9021-m3-d1-3.2-d2-9-h-0.8", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m3-d1-3.2-d2-9-h-0.8.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m3-d1-3.2-d2-9-h-0.8.stl", "note": "M3 DIN 9021 large washer at nominal size: bore Ø3.2 (d1 nom = min), outside Ø9 (d2 nom = max), thickness 0.8 mm (h nom); plain flat annulus, no edge radius" }, { "file": "washer-din-9021-m4-d1-4.3-d2-12-h-1", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m4-d1-4.3-d2-12-h-1.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m4-d1-4.3-d2-12-h-1.stl", "note": "M4 DIN 9021 large washer at nominal size: bore Ø4.3 (d1 nom = min), outside Ø12 (d2 nom = max), thickness 1 mm (h nom); plain flat annulus, no edge radius" }, { "file": "washer-din-9021-m5-d1-5.3-d2-15-h-1.2", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m5-d1-5.3-d2-15-h-1.2.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m5-d1-5.3-d2-15-h-1.2.stl", "note": "M5 DIN 9021 large washer at nominal size: bore Ø5.3 (d1 nom = min), outside Ø15 (d2 nom = max), thickness 1.2 mm (h nom); plain flat annulus, no edge radius" }, { "file": "washer-din-9021-m6-d1-6.4-d2-18-h-1.6", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m6-d1-6.4-d2-18-h-1.6.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m6-d1-6.4-d2-18-h-1.6.stl", "note": "M6 DIN 9021 large washer at nominal size: bore Ø6.4 (d1 nom = min), outside Ø18 (d2 nom = max), thickness 1.6 mm (h nom); plain flat annulus, no edge radius" }, { "file": "washer-din-9021-m8-d1-8.4-d2-24-h-2", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m8-d1-8.4-d2-24-h-2.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m8-d1-8.4-d2-24-h-2.stl", "note": "M8 DIN 9021 large washer at nominal size: bore Ø8.4 (d1 nom = min), outside Ø24 (d2 nom = max), thickness 2 mm (h nom); plain flat annulus, no edge radius" }, { "file": "washer-din-9021-m10-d1-10.5-d2-30-h-2.5", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m10-d1-10.5-d2-30-h-2.5.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m10-d1-10.5-d2-30-h-2.5.stl", "note": "M10 DIN 9021 large washer at nominal size: bore Ø10.5 (d1 nom = min), outside Ø30 (d2 nom = max), thickness 2.5 mm (h nom); plain flat annulus, no edge radius" }, { "file": "washer-din-9021-m12-d1-13-d2-37-h-3", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m12-d1-13-d2-37-h-3.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m12-d1-13-d2-37-h-3.stl", "note": "M12 DIN 9021 large washer at nominal size: bore Ø13 (d1 nom = min), outside Ø37 (d2 nom = max), thickness 3 mm (h nom); plain flat annulus, no edge radius" }, { "file": "washer-din-9021-m16-d1-17-d2-50-h-3", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m16-d1-17-d2-50-h-3.step", "stl": "https://xemstudio.com/files/hardware/large-washers-din-9021-iso-7093/washer-din-9021-m16-d1-17-d2-50-h-3.stl", "note": "M16 DIN 9021 large washer at nominal size: bore Ø17 (d1 nom = min), outside Ø50 (d2 nom = max), thickness 3 mm (h nom); plain flat annulus, no edge radius" } ], "markdown": "https://xemstudio.com/objects/large-washers-din-9021-iso-7093/index.md" }