Warm note: if these truss head screws loosen during use, it is mainly caused by the compression of the supporting surface, the radial force of the bolted connection, or the initial loosening. Head Style Pan, Truss....
Warm note: if these truss head screws loosen during use, it is mainly caused by the compression of the supporting surface, the radial force of the bolted connection, or the initial loosening. Head Style Pan, Truss....