{ "version": "2026-10-20", "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.", "slug": "nyloc-nuts-metric", "name": "Nyloc lock nuts, M2.5–M8 (DIN 985)", "kind": "hardware", "category": "Hardware", "group": "Fasteners", "year": null, "question": "How thick is an M3 nyloc nut?", "tags": [ "nut", "lock nut", "nyloc", "fastener" ], "aliases": [ "nyloc nut", "nylock", "lock nut", "din 985", "m3 lock nut" ], "overall_mm": { "length": null, "width": null, "height": null }, "official_cad": false, "xem_status": "free-files", "les": false, "free_files": 6, "url": "https://xemstudio.com/objects/nyloc-nuts-metric/", "sheet_txt": "https://xemstudio.com/objects/nyloc-nuts-metric/sheet.txt", "sheet": { "basis": "DIN 985 / ISO 10511 (thin type is lower; values are the common DIN 985)", "overall_mm": { "length": null, "width": null, "height": null }, "notes": [ "Same across-flats as a plain nut, taller because of the nylon collar: M3 is 4.0 mm vs 2.4 mm plain. Size a nut pocket to the full height.", "Not reusable more than a few times; don't rely on them on a printed part that will be opened often." ], "table": { "columns": [ "thread", "width_af_mm", "height_mm" ], "rows": [ [ "M2.5", 5, 2.9 ], [ "M3", 5.5, 4 ], [ "M4", 7, 5 ], [ "M5", 8, 5 ], [ "M6", 10, 6 ], [ "M8", 13, 8 ] ] } }, "sheet_text": "Nyloc lock nuts, M2.5–M8 (DIN 985) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/nyloc-nuts-metric/ (CC BY 4.0)\nBasis: DIN 985 / ISO 10511 (thin type is lower; values are the common DIN 985)\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Same across-flats as a plain nut, taller because of the nylon collar: M3 is 4.0 mm vs 2.4 mm plain. Size a nut pocket to the full height.\n- Not reusable more than a few times; don't rely on them on a printed part that will be opened often.\n\nthread width_af_mm height_mm\nM2.5 5.0 2.9\nM3 5.5 4.0\nM4 7.0 5.0\nM5 8.0 5.0\nM6 10.0 6.0\nM8 13.0 8.0\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- McMaster-Carr: Nylon-insert locknuts (free STEP/IGES/STL per part, for your own design use; no redistribution) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/nylon-insert-locknuts/\n- Wikipedia: Nyloc nut — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Nyloc_nut\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 6 parts): https://xemstudio.com/files/hardware/nyloc-nuts-metric/index.json\nAPI: https://xemstudio.com/api/geometry?object=nyloc-nuts-metric\n", "sources": [ { "publisher": "McMaster-Carr", "title": "Nylon-insert locknuts (free STEP/IGES/STL per part, for your own design use; no redistribution)", "url": "https://www.mcmaster.com/products/nylon-insert-locknuts/", "formats": [ "STEP", "IGES", "STL", "PDF" ], "license": "McMaster-Carr site terms: personal design use, no redistribution", "license_verified": false, "hosted": false }, { "publisher": "Wikipedia", "title": "Nyloc nut", "url": "https://en.wikipedia.org/wiki/Nyloc_nut", "formats": [ "web" ], "license": "CC BY-SA 4.0 (text)", "license_verified": true, "hosted": false } ], "xem": { "status": "free-files", "sheet_free": true, "mesh_price_usd": null, "step_price_usd": null, "tolerance_mm": null }, "related": [ "hex-nuts-metric", "socket-head-cap-screws-metric", "flat-washers-metric" ], "faq": [ { "q": "How tall is an M3 nyloc nut?", "a": "4.0 mm (5.5 mm across flats); an M4 is 5.0 mm (7 AF), M5 5.0 mm (8 AF), M6 6.0 mm (10 AF), M8 8.0 mm (13 AF)." }, { "q": "Can I print a pocket for a nyloc nut?", "a": "Yes: AF + 0.3 mm, depth = nut height + 0.3 mm. The nylon collar must face away from the screw entry." } ], "files_license": null, "offers": [ { "file": "nyloc-m2.5", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m2.5.step", "stl": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m2.5.stl", "note": "DIN 985 M2.5, 5.0 AF × 2.9 high" }, { "file": "nyloc-m3", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m3.step", "stl": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m3.stl", "note": "DIN 985 M3, 5.5 AF × 4.0 high" }, { "file": "nyloc-m4", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m4.step", "stl": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m4.stl", "note": "DIN 985 M4, 7.0 AF × 5.0 high" }, { "file": "nyloc-m5", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m5.step", "stl": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m5.stl", "note": "DIN 985 M5, 8.0 AF × 5.0 high" }, { "file": "nyloc-m6", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m6.step", "stl": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m6.stl", "note": "DIN 985 M6, 10.0 AF × 6.0 high" }, { "file": "nyloc-m8", "formats": [ "step", "stl" ], "price_usd": 0, "license": "CC BY 4.0 (Xem Studio)", "step": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m8.step", "stl": "https://xemstudio.com/files/hardware/nyloc-nuts-metric/nyloc-m8.stl", "note": "DIN 985 M8, 13.0 AF × 8.0 high" } ], "markdown": "https://xemstudio.com/objects/nyloc-nuts-metric/index.md" }