ASME B18.22.1 1/2 Flat washer
ASME B18.22.1 1/2 is a flat washer, sized for 1/2 bolts. The inch-series plain washer in the preferred series. Inside diameters are sized to the nominal bolt diameter plus clearance, matching the inch bolt range rather than metric.
Dimensions
- Standard
- ASME B18.22.1
- Type
- Flat washer
- Size
- 1/2
- For bolt size
- 1/2
- Total height h
- 0.095 in
- Inside diameter d1
- 0.531 in
- Outside diameter d2
- 1.062 in
Nominal values in inches as published in ASME B18.22.1. Estimated weight 8.119 g per piece in steel (8.171 g in stainless), calculated from the nominal geometry — real parts vary with tolerance and head chamfers.
Other lengthsASME B18.22.1 1/2
All 1/2 specificationsChoosing and fitting this size
ASME B18.22.1 1/2 is a washer with a 0.531 in inside diameter. It sits under a bolt head or nut to spread the clamping load; the inside diameter matches the bolt it is specified for, so the washer and fastener should always be ordered as a pair.
Hardness is the governing property rather than tensile strength: a washer specified for a Grade 8 bolt must be hard enough not to deform under preload, otherwise the joint loses clamping force quietly. Match the washer grade to the bolt grade rather than picking on inside diameter alone.