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5/8" x 3-1/4", US

US Fasteners, 5/8" x 3-1/4"

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.

Socket product

Socket screws

Screws with an Allen wrench drive.

Rod & Stock

Studs, Rod & Stock

Studs, threaded rod, unthreaded rod and keystock for industrial, machining and manufacturing applications.