Structural Fasteners (Inch)

Heavy Hex Bolts

Size [1] [2] Diameter Flat Width Head Height Thread Length
1/2 0.500 0.875 0.323 1.000
5/8 0.625 1.063 0.403 1.250
3/4 0.750 1.250 0.483 1.380
7/8 0.875 1.438 0.563 1.500
1 1.000 1.625 0.627 1.750
1 1/8 1.125 1.813 0.718 2.000
1 1/4 1.250 2.000 0.813 2.000
1 3/8 1.375 2.188 0.878 2.250
1 1/2 1.500 2.375 0.974 2.250

Material specifications:

  • A325
  • A490

Heavy Hex Nuts

Size [1:1] [2:1] Diameter Flat Width Thickness
1/2 0.500 0.875 0.504
5/8 0.625 1.063 0.631
3/4 0.750 1.250 0.758
7/8 0.875 1.438 0.885
1 1.000 1.625 1.012
1 1/8 1.125 1.813 1.136
1 1/4 1.250 2.000 1.215
1 3/8 1.375 2.188 1.378
1 1/2 1.500 2.375 1.505

Material specifications: A563

Flat Washers

Size [1:2] [2:2] ID OD Thickness
1/2 0.531 1.063 0.097
5/8 0.688 1.313 0.122
3/4 0.813 1.469 0.122
7/8 0.938 1.750 0.136
1 1.125 2.000 0.136
1 1/8 1.250 2.250 0.136
1 1/4 1.375 2.500 0.136
1 3/8 1.500 2.750 0.136
1 1/2 1.625 3.000 0.136

Material specification: F436


  1. Dimensions per ASME B18.2.6-1996 in inches. ↩︎ ↩︎ ↩︎

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