Nuts & Washers Dimensions DIN 934/125/127/9021

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

DIN 934 — Hex Nut dimensions

Size	d (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

Size	d₁ inner (mm)	d₂ outer (mm)	h thickness (mm)

Spring (split-lock) washers per DIN 127-B (square ends) | d₁ = inner ∅ | d₂ = outer ∅ | b = radial width | s = wire/section thickness

DIN 127 — Spring Washer dimensions

Size	d₁ inner (mm)	d₂ 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

Size	d₁ inner (mm)	d₂ outer (mm)	h thickness (mm)