TIMCO Self-Drilling Wing-Tip Steel to Timber Heavy Section Silver Drill Screw - 5.5 x 100

Specifically 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 thread to self-tap into the metal. NOTE: Partially threaded.ApprovalBS EN 10666 (DIN 7504)Corrosion Rating1 - Clean, dry & low humidity environmentsDescriptionSpecifically 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 thread to self-tap into the metal. NOTE: Partially threaded.Drill Tip Angle degree110Drill Tip Length mm25.00Drill Tip Width mm5.00Driver Bit SizePH3Effective Thread Length mm51 *P/TFinishZincHead Dia. mm11.00Head Height mm5.00Head TypeCountersunk with RibsIncluded ItemsPH3 S2 Bit (Qty 1)Length mm100MaterialCase & Core Hardened Carbon