Hex Nuts (Metric)

Size [1] [2] Pitch Diameter Flat Width Thickness
M1.6 0.35 1.60 3.20 1.30
M2 0.4 2.00 4.00 1.60
M2.5 0.45 2.50 5.00 2.00
M3 0.5 3.00 5.50 2.40
M3.5 0.6 3.50 6.00 2.80
M4 0.7 4.00 7.00 3.20
M5 0.8 5.00 8.00 4.70
M6 1 6.00 10.00 5.20
M8 1.25 8.00 13.00 6.80
M10 1.5 10.00 16.00 8.40
M12 1.75 12.00 18.00 10.80
M16 2 16.00 24.00 14.80
M20 2.5 20.00 30.00 18.00
M24 3 24.00 36.00 21.50
M30 3.5 30.00 46.00 25.60
M36 4 36.00 55.00 31.00

Materials

  • 18-8 Stainless
  • 316 Stainless

  1. Dimensions per ASME B18.2.6M-2012 (Style 1) in millimeters. ↩︎

  2. Oberg, Jones, Horton, Ryffel, McCauley. (2020). Machinery’s Handbook 31 Digital Edition. Industrial Press eBookstore ↩︎