# Washers for clamping fixtures, DIN 6340: M6–M30 bore, outside diameter, thickness > What bore, outside diameter and thickness does a DIN 6340 washer for clamping fixtures have for M6 to M30? - Category: Hardware › Fasteners - Kind: Standard part - Basis: Halder and norelem DIN 6340 tables (d1, d2, h), cross-checked against Ganter, Würth, Kramp and AMF / Hoffmann; every row agrees in at least three sources - Page: https://xemstudio.com/objects/washers-clamping-fixtures-din-6340/ · JSON: https://xemstudio.com/api/geometry?object=washers-clamping-fixtures-din-6340 · Plain text: https://xemstudio.com/objects/washers-clamping-fixtures-din-6340/sheet.txt - License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license - Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/) **Exact dimensions.** Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. ## Notes - Columns: thread, bore d1, outside diameter d2, thickness h (edition 1987-04). Hardened and ground in practice. - Manufacturers disagree on whether the edges are broken and none gives a size, so edges are drawn sharp. ## Mating features (exact size; open press / slide / run / socket by your process clearance, leave designed and clamp as drawn) | feature | exact | mates with | fit | files | |---|---|---|---|---| | bore | d1 (M12 13, M20 21) | stud or clamping bolt of the listed thread | designed | all | | faces | Ø d2 × h (M12 35 × 5) | clamp strap and collar nut (DIN 6331) | designed | all | ## Sizes | thread | d1 | d2 | h | |---|---|---|---| | M6 | 6.4 | 17 | 3 | | M8 | 8.4 | 23 | 4 | | M10 | 10.5 | 28 | 4 | | M12 | 13 | 35 | 5 | | M16 | 17 | 45 | 6 | | M20 | 21 | 50 | 6 | | M24 | 25 | 60 | 8 | | M30 | 31 | 68 | 10 | ## Where the files are - Halder: [Washers DIN 6340, EH 23060](https://halder.com/at/file-download/object_file_dsag_eh23060_1_de) — web — Publisher's page; dimensions are facts - norelem (via Marek): [Washers for clamping fixtures DIN 6340 (07320)](https://www.marek.eu/en/norelem-clamping-technology-standard-elements-operating-parts/flexible-standard-component-system/fastening-elements/fasteners-connecting-elements/24904/washers-for-clamping-fixtures-steel-or-aluminium-din-6340.html) — web — Publisher's page; dimensions are facts - Kramp: [Washer M30 × 68 × 10 DIN 6340](https://kramp.com/shop-ro/en/p/washer-m30x68x10mm-steel-zinc-plated-din-6340-kramp--634030) — web — Publisher's page; dimensions are facts ## Free STEP/STL (8 parts, CC BY 4.0, Xem Studio) Index: https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/index.json - din6340-m6: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m6.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m6.stl) — DIN 6340 M6: 6.4 × Ø17 × 3 - din6340-m8: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m8.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m8.stl) — DIN 6340 M8: 8.4 × Ø23 × 4 - din6340-m10: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m10.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m10.stl) — DIN 6340 M10: 10.5 × Ø28 × 4 - din6340-m12: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m12.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m12.stl) — DIN 6340 M12: 13 × Ø35 × 5 - din6340-m16: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m16.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m16.stl) — DIN 6340 M16: 17 × Ø45 × 6 - din6340-m20: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m20.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m20.stl) — DIN 6340 M20: 21 × Ø50 × 6 - din6340-m24: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m24.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m24.stl) — DIN 6340 M24: 25 × Ø60 × 8 - din6340-m30: [STEP](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m30.step) · [STL](https://xemstudio.com/files/hardware/washers-clamping-fixtures-din-6340/din6340-m30.stl) — DIN 6340 M30: 31 × Ø68 × 10 ## Questions **What size is an M12 DIN 6340 washer?** 13 mm bore, 35 mm outside, 5 mm thick. **Why use DIN 6340 instead of a normal washer on a fixture?** It is thicker and usually hardened, so it does not dish under repeated clamping with T-slot nuts and studs. ## Fits with - [Hexagon nuts with collar, 1.5 d high, DIN 6331: M6–M36 across flats, collar diameter, height](https://xemstudio.com/objects/hex-nuts-collar-din-6331/) - [T-slot nuts, DIN 508: M4–M22 for 5–24 mm T-slots, neck width, base, height](https://xemstudio.com/objects/t-slot-nuts-din-508/) - [Spherical washers, DIN 6319 form C: M5–M48 bore, outside diameter, sphere radius, height](https://xemstudio.com/objects/spherical-washers-din-6319-c/) - [Thick washers, DIN 7349: M3–M30 bore, outside diameter, thickness](https://xemstudio.com/objects/thick-washers-din-7349/)