Timco - Metal Construction Timber to Light Section Screws - Countersunk - Wing-Tip - Self-Drilling - Zinc (Size 4.2 x 38-200 Pieces)

Specifically designed to attach wood to light section steel (Max. 3mm). 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. Corrosion Rating1 - Clean, dry & low humidity environmentsDescriptionSpecifically designed to attach wood to light section steel (Max. 3mm). 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. Drill Tip Angle degree110Drill Tip Length mm13.00Drill Tip Width mm3.40Driver Bit SizePH2Effective Thread Length mm19FinishZincHead Dia. mm9.50Head Height mm4.00Head TypeCountersunk with RibsIncluded ItemsPH2 S2 Bit (Qty 1)Length mm38MaterialCase & Core Hardened Carbon SteelMax Drilling Thickness mm3.0Max Fixture Thickness mm20Pack