2x TIMCO Metal Construction Timber to Heavy Section Screws Countersunk Wingtip Selfdrilling Zinc HW100B Pack of 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.See `More Information` below for sizing and Colour detailsSpecificationFinish = ZincTo Suit Timber (metric) = 64mm - 78mmPackaged Height = 92mmHead = Countersunk with RibsPackaged Width = 94mmThread Diameter (metric) = 5.5mmPackaged Weight = 1.44kgPackaged Length = 138mmLength (metric) = 100mmEffective Thread Length (metric) = 63mmMax Drilling Thickness (metric) = 12mmType of Recess = PhillipsHeight = 5.5mmLength = 100mmMaterial = Case & Core Hardened Carbon SteelType of Point = Self-Drilling No.5Width = 5.5mmPTDTIMHW100B

General description Specifically designed to attach wood to heavy section steel (Max. 12mm), the TIMCO Self-Drilling Wing-Tip Steel to Timber Heavy Section Silver Screws are engineered for optimal performance. The metric thread features wings that ream out the timber, allowing the screw to achieve maximum revolutions per minute (R.P.M.) without burning out. When the wings contact the metal, they break off to facilitate the threading process. Technical specifications Dimensions: 5.5 x 100 mm Maximum steel thickness: 12 mm