Shear Fastener
Shear Bolt has a break-away hexagonal drive head which makes this one-way screw, very difficult to remove once installed.Installed with a standard box or ring spanner, or a socket drive, the bolts are available with either a countersunk or button style head.
Shear Nut are a Break-Away type of security nut, that provide a permanent fastening that is very hard to remove again once installed.These tamper proof nuts are among the most popular security nuts available and are available in a range of materials to suit indoor or outdoor applications. They are installed with a conventional ring or box spanner or a suitable socket drive.