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Representative photo. Finish, head marking and packaging follow your order.
Hex Bolts
Inch-series finished hex cap screws to ASME B18.2.1 in SAE J429 Grade 5 (medium carbon, quenched and tempered) and Grade 8 (medium carbon alloy). Grade 8 is traditionally supplied yellow zinc; zinc-nickel is the upgrade for longer corrosion life on trucks, trailers and farm equipment.
| Size | Width across flats | Head height |
|---|---|---|
| 1/4" | 7/16" | 5/32" |
| 5/16" | 1/2" | 13/64" |
| 3/8" | 9/16" | 15/64" |
| 7/16" | 5/8" | 9/32" |
| 1/2" | 3/4" | 5/16" |
| 5/8" | 15/16" | 25/64" |
| 3/4" | 1-1/8" | 15/32" |
| 1" | 1-1/2" | 39/64" |
Nominal inch values for reference.
| Finish | Applied | Notes |
|---|---|---|
| Zinc plated | Our own line | Clear/blue, yellow or black passivation |
| Zinc-nickel | Our own line | 12–15 µm, clear or black passivation; 1,000 h (12 µm) to 1,440 h (15 µm) neutral salt spray |
| Black oxide / phosphate | Available | Indoor or oiled service |
| Plain | Available | For customer-side coating |
For property class 10.9 and above, choose zinc flake, or zinc-nickel with hydrogen-embrittlement relief agreed at order stage.
Tell us size, grade, finish and quantity. We reply with price and lead time within 24 hours.
