Round washers for timber, DIN 440 form R: M5–M36 bore, outside diameter, thickness — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/round-washers-timber-din-440-r/  (sheet CC BY 4.0)
Basis: fasteners.eu DIN 440 table (d1, d2, s), cross-checked against Westfield Fasteners, globalfastener, Böllhoff and Würth listings
Catalog version: 2026-10-20

Sizes: see table below
- Columns: thread, bore d1, outside diameter d2, thickness s. Form R has a round hole (form V has a square hole). DIN 440 was replaced by ISO 7094 but is still widely sold.
- M33 is omitted (sources disagree). Edges drawn sharp.

thread  d1  d2  s
M5  5.5  18  2
M6  6.6  22  2
M8  9  28  3
M10  11  34  3
M12  13.5  44  4
M14  15.5  50  4
M16  17.5  56  5
M20  22  72  6
M22  24  80  6
M24  26  85  6
M27  30  98  6
M30  33  105  6
M36  39  125  8

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Westfield Fasteners: DIN 440 type R wood construction washers: d1, d2, s — web — Publisher's page; dimensions are facts — https://www.westfieldfasteners.co.uk/Standards/Washer-WoodCon440R-M.html
- Würth: Washer DIN 440 R M12, 13.5 × 44 × 4 — web — Publisher's page; dimensions are facts — https://eshop.wurth.ae/Washer-with-round-hole-Mainly-for-wood-construction-DIN-440-plain-steel-WSH-WO-DIN440-R-135X44X4/045414.sku/en/US/AED

Free files (CC BY 4.0, Xem Studio; STEP + STL, 13 parts): https://xemstudio.com/files/hardware/round-washers-timber-din-440-r/index.json
API: https://xemstudio.com/api/geometry?object=round-washers-timber-din-440-r