This type of Square washers distribute loads when fasten bolts and screws in clamping and other fixing applications. Some helps with shims, spacers, and reinforced attachments.
| Screw Thread d | M10 | M12 | M16 | M20 | M22 | M24 | M27 | M30 | M33 | M36 | M39 | M42 | M45 | M48 | M52 | ||
| d | min=nominal size | 11 | 13.5 | 17.5 | 22 | 24 | 26 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | 52 | 56 | |
| max | 11.43 | 13.93 | 18.2 | 22.84 | 24.84 | 26.84 | 30.84 | 34 | 37 | 40 | 43 | 46 | 49 | 53.2 | 57.2 | ||
| s | max=nominal size | 30 | 40 | 50 | 60 | 70 | 80 | 90 | 95 | 100 | 110 | 125 | 135 | 140 | 150 | 160 | |
| min | 28.7 | 38.4 | 48.4 | 58.1 | 68.1 | 78.1 | 87.8 | 92.8 | 97.8 | 107.8 | 122.5 | 132.5 | 137.5 | 147.5 | 157.5 | ||
| h | Nominal Size | 3 | 4 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 8 | 8 | 10 | 10 | |
| max | 3.6 | 4.6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 9.2 | 9.2 | 9.2 | 9.2 | 11.2 | 11.2 | ||
| min | 2.4 | 3.4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6.8 | 6.8 | 6.8 | 6.8 | 8.8 | 8.8 | ||
| per 1000 units ≈ kg | 20 | 45.7 | 88.7 | 126 | 209 | 275 | 348 | 385 | 423 | 685 | 895 | 1050 | 1120 | 1600 | 1820 | ||
| For Nominal Thread Diameter | 3/8' | 3/8' | 1/2' | 1/2' | 5/8' | 5/8' | 5/8' | 3/4' | 3/4' | ||||||||
| d | 0,+ 1/32 | 7/16' | 7/16' | 9/16' | 9/16' | 11/16' | 11/16' | 11/16' | 13/16' | 13/16' | |||||||
| s | 1-1/2' | 2 | 1-1/2' | 2 | 2 | 3 | 3 | 2-1/2' | 3 | ||||||||
| h | 0.128 | 0.128 | 0.128 | 0.128 | 0.128 | 0.192 | 0.252 | 0.128 | 0.192 | ||||||||
| For Nominal Thread Diameter | 3/4' | 3/4' | 7/8' | 7/8' | 1 | 1 | 1 | 1-1/4' | 1-1/4' | ||||||||
| d | 0,+ 1/32 | 13/16 | 13/16 | 15/16 | 15/16 | 1-1/16' | 1-1/16' | 1-1/16' | 1-3/8' | 1-3/8' | |||||||
| s | 3 | 4 | 2-1/2' | 3 | 3 | 4 | 4 | 4 | 4 | ||||||||
| h | 0.252 | 0.252 | 0.128 | 0.252 | 0.252 | 0.252 | 0.372 | 0.252 | 0.372 | ||||||||