TIMCO Self-Drilling Wing-Tip Steel to Timber Heavy Section Silver Screws - 5.5 x 85 De-Burring Countersink The heavy duty spring

The heavy duty spring

Ideal for applications where a traditional cosmetic finish is required or for use in a corrosive environment

A single flute countersink designed for cleaning

Specifically designed to attach composite panel to light section steel (Max

Strengthening inside corners

TIMCO Self-Drilling Wing-Tip Steel to Timber Heavy Section Silver Screws - 5.5 x 85 De-Burring Countersink The heavy duty springSpecifically designed to attach wood to heavy section steel (Max. 12mm). Metric 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 thre