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Hex nuts per DIN 934 / ISO 4032  |  SW = wrench size (across flats)  |  m = nut height  |  e = across corners ā‰ˆ SW / cos 30°  |  d1 = bore (thread clearance hole)

DIN 934 — Hex Nut dimensions

Sized (mm)SW / AF (mm) m height (mm)e corners (mm)d₁ bore (mm)
Plain washers per DIN 125-1 form A / ISO 7089  |  d1 = inner diameter  |  d2 = outer diameter  |  h = thickness

DIN 125 — Plain Washer dimensions

Sized₁ inner (mm)dā‚‚ outer (mm)h thickness (mm)
Spring (split-lock) washers per DIN 127-B (square ends)  |  d1 = inner āˆ…  |  d2 = outer āˆ…  |  b = radial width  |  s = wire/section thickness

DIN 127 — Spring Washer dimensions

Sized₁ inner (mm)dā‚‚ outer (mm) b width (mm)s thickness (mm)
Large (fender) washers per DIN 9021 / ISO 7093  |  Wider outer diameter distributes load over a larger area  |  Suitable for soft materials, oversized holes, timber connections

DIN 9021 — Large Washer dimensions

Sized₁ inner (mm)dā‚‚ outer (mm)h thickness (mm)