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Large (fender) washers, DIN 9021 / ISO 7093: M2.5–M36 bore, outside diameter, thickness + nylon variant + 8 washer files

What are the dimensions of a DIN 9021 large washer, and what size is an M8 fender washer? · Standard part · 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

Also called: 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

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. Mating features

length
50.0 mm
width
50.0 mm
height
3.0 mm

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.

Large (fender) washers, DIN 9021 / ISO 7093: M2.5–M36 bore, outside… size chart

standardthreadd1 nom = mind1 maxd2 nom = maxd2 minh nomh maxh min
DIN 9021 steelM2.52.72.8487.640.80.90.7
DIN 9021 steelM33.23.3898.640.80.90.7
DIN 9021 steelM3.53.73.881110.570.80.90.7
DIN 9021 steelM44.34.481211.5711.10.9
DIN 9021 steelM55.35.481514.571.21.41
DIN 9021 steelM66.46.621817.571.61.81.4
DIN 9021 steelM77.47.622221.4822.21.8
DIN 9021 steelM88.48.622423.4822.21.8
DIN 9021 steelM1010.510.773029.482.52.72.3
DIN 9021 steelM121313.273736.3833.32.7
DIN 9021 steelM141515.274443.3833.32.7
DIN 9021 steelM161717.275049.3833.32.7
DIN 9021 steelM182020.525654.144.63.4
DIN 9021 steelM202222.526058.144.63.4
DIN 9021 steelM242626.847270.1564
DIN 9021 steelM3033349289.8675
DIN 9021 steelM363940110107.889.26.8
DIN 9021 nylon (JC Fasteners)M22.22.3476.640.80.90.7

Mating features

Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.

featureexactmates withfitfiles
bore (d1)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)screw / bolt of the thread size; plain cylinder at the thread major diameterdesignedwasher-din-9021-*
outside (d2)M3 9, M4 12, M5 15, M6 18, M8 24, M10 30, M12 37, M16 50 mm (nominal = maximum)round counterbore or boss that seats the washer: Ø = d2 + your process clearanceslidewasher-din-9021-*
thickness (h)0.8, 1, 1.2, 1.6, 2, 2.5, 3, 3 mm nominal for M3 to M16recess depth under the washerdesignedwasher-din-9021-*

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Westfield FastenersWashers with large outside diameter, DIN 9021 (cites ISO 7093): d1 min / max, d2 max / min, h nom / max / min, M2.5 to M36webPublisher's page; dimensions are facts
fasteners.euDIN 9021 plain washer, outer diameter about 3 d (current norm DIN EN ISO 7093-1): d1, d2, h, weightwebPublisher's page; dimensions are facts
JC FastenersDIN 9021 large washer, nylon: d1, d2, h by size, M2 to M36webMaker data sheet; numbers only
McMaster-CarrLarge-diameter washers (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify

Free files

★ Free files 8 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

washer-din-9021-m3-d1-3.2-d2-9-h-0.8M3 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 radiusSTEP · STL
washer-din-9021-m4-d1-4.3-d2-12-h-1M4 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 radiusSTEP · STL
washer-din-9021-m5-d1-5.3-d2-15-h-1.2M5 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 radiusSTEP · STL
washer-din-9021-m6-d1-6.4-d2-18-h-1.6M6 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 radiusSTEP · STL
washer-din-9021-m8-d1-8.4-d2-24-h-2M8 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 radiusSTEP · STL
washer-din-9021-m10-d1-10.5-d2-30-h-2.5M10 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 radiusSTEP · STL
washer-din-9021-m12-d1-13-d2-37-h-3M12 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 radiusSTEP · STL
washer-din-9021-m16-d1-17-d2-50-h-3M16 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 radiusSTEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=large-washers-din-9021-iso-7093

Large (fender) washers, DIN 9021 / ISO 7093: M2.5–M36 bore, outside diameter, thickness + nylon variant + 8 washer files, isometric render of a generated part
Render of washer-din-9021-m8-d1-8.4-d2-24-h-2 from the free STEP; not to scale.

Fits with

Flat washers, M2–M8 (ISO 7089), isometric render of a generated part
Flat washers, M2–M8 (ISO 7089)7 sizes★ 7 files
Flat washers, M10 to M24 (ISO 7089 / DIN 125-A), isometric render of a generated part
Flat washers, M10 to M24 (ISO 7089 / DIN 125-A)6 sizes★ 6 files
Flat washers, ISO 7090 (chamfered, normal series): M5–M64 bore, outside diameter, thickness + M30–M48 washer files, isometric render of a generated part
Flat washers, ISO 7090 (chamfered, normal series): M5–M64 bore, outside diameter, thickness + M30–M48 washer files110.0×110.0×8.0 mm★ 4 files
Spring lock washers, DIN 127 B (split washers, rectangular section): M2–M100 bore, outside diameter, width, thickness, free height34 sizes★ sheet
Serrated (tooth) lock washers, DIN 6798 forms A, J, V: M1.6–M30 bore, outside diameter, thickness, number of teeth58 sizes★ sheet
Hex nuts, M2–M8 (ISO 4032), isometric render of a generated part
Hex nuts, M2–M8 (ISO 4032)7 sizes★ 7 files

Questions

What is the outside diameter of an M8 DIN 9021 washer?

24 mm (maximum, nominal), 23.48 mm minimum; bore 8.4 mm, thickness 2 mm nominal (1.8 to 2.2).

What is the difference between DIN 9021 and DIN 125?

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.

Is a DIN 9021 washer the same as ISO 7093?

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.