Hex screw, also known as socket screw or Allen bolt, is a screw with a hexagonal hole in the head.
Use a wrench for square head bolts and screws.
Hex screws are a versatile fastener that can be used in a variety of applications.
Hex screws are a type of fastener that consists of a head and a threaded shaft.
The head is hexagonal in shape, which allows it to be tightened with a wrench or socket.
Internal hex bolt is often used in machinery. It has the advantages of easy tightening, disassembly and not easy sliding angle.