Socket screws are also known as Allen head screws or bolts, and are fastened using a hexagonal or shaped wrench, requiring a key to tighten and remove. Standard sizes available from stock.

Socket screws are a type of screw designed and manufactured with a hexagonal (hex) internal drive built into the head. As such, they are intended to be tightened and loosened with an Allen wrench or hex key, as opposed to a traditional screwdriver.