Grade 8 hex bolt

Hex bolts, Zinc plated grade 8 steel yellow

Hex bolt diameter is measured on the outside of the threads.

Hex bolt diameter

^ NOTE: While 12tpi is the fine thread (UNF) standard, 14tpi is far more common in actual use.

See also

Metric hex bolt

Metric hex bolts

Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.