Q. What is a bolt lock?

Answer

A bolt lock is a type of metal fastener that consists of a cylinder with segmented threads and a cylindrical collar. The term "fastener" refers to any item used to permanently connect and hold together two surfaces. It is possible to attach a bolt lock by threading the collar onto the cylinder and firmly crimping it into place. Bolt locks are frequently used to make permanent strong connections that can withstand shock and movement. When welding isn't an option machinists will commonly employ a bolt lock to securely join the two pieces. After installation the collar on some lock bolts can be removed so that the cylinder can be recycled and used again with a fresh collar.