11, 4-1/2", US, Stainless steel

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.

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

Fasteners for anchoring in stone, concrete, brick and drywall, etc.

Screws with an unthreaded shoulder that is larger in diameter than the threads. Also known as stripper bolts.