Zinc and Blue passivated and case hardened. For use with high density fibre boards. Tri Lock threadform and shank incorporate the benefits of a single coarse thread with a twin thread start. Spiral point, part thread and under head ribs for self coun
Zinc and Blue passivated and case hardened. For use with high density fibre boards. Tri Lock threadform and shank incorporate the benefits of a single coarse thread with a twin thread start. Spiral point, part thread and under head ribs for self coun
