Designed to meet the latest developments in MDF board. Tri-Lock threadform and shank incorporates the benefits of a single coarse thread with a twin thread start on the same screw. Spiral point breaks through the hard, dense surface, allowing the twin...

Designed to meet the latest developments in MDF board. Tri-Lock threadform and shank incorporates the benefits of a single coarse thread with a twin thread start on the same screw. Spiral point breaks through the hard, dense surface, allowing the twin...

Zinc and blue-passivated and case-hardened. 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-countersinking. Flush, neat fix will not work...