Metal Construction Timber to Light Section Screws - Countersunk - Wing-Tip - Self-Drilling - Bi-Metal - Exterior - Silver Organic Provides a large clamping surface

Provides a large clamping surface and therefore spreading the load of a fastening

with a washered hexagon head

When fixing into brick a red (5

Stainless steel must be used where there is corrosive environment and/or the base material has inherent corrosive characteristics

When the wings hit the metal they will break off to permit the thread to self-tap into the metal

Metal Construction Timber to Light Section Screws - Countersunk - Wing-Tip - Self-Drilling - Bi-Metal - Exterior - Silver Organic Provides a large clamping surfaceSpecifically designed to attach wood to light section steel (Max. 4mm). Coarse self tapping thread with wings designed to ream out the timber, so the screw can achieve Max. R. P. M. without burning out. When the wings hit the metal they will break off to permit the thread to self tap into the metal.