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5/16", Grade 8 steel

US Fasteners, 5/16", Grade 8 steel

Hex bolt

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.

Flange bolts

Flange bolts

Flange bolts have a flange on the bottom of the head that distributes the load like a washer.

Carriage bolt

Carriage bolts & Plow bolts

Bolts with no drive and machine threads for use with a nut.



Nuts have internal machine threads, for use with machine thread bolts and screws.