A 12-point flange bolt is a specialized type of threaded fastener that combines features of both a bolt and a nut. It is designed for specific applications where high torque is required, and it offers advantages over traditional hex bolts and nuts.

The most distinctive feature of a 12-point flange bolt is its head, which has 12 points or corners. This head design provides multiple points of contact for a wrench or socket, allowing for higher torque application compared to a standard hex head.