TIMCO Metal Construction Timber to Heavy Section Screws Countersunk Exterior Silver Organic BMHW55 Pack of 200

Specifically Designed To Attach Wood To Metal (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. Hardened Carbon Steel Drill Tip Fused On To An A2-304 Austenitic Stainless Steel BodySee `More Information` below for sizing and Colour detailsSpecificationTo Suit Timber (metric) = ≤13mmPackaged Height = 90mmLength (metric) = 55mmPackaged Width = 90mmThread Diameter (metric) = 5.5mmPackaged Weight = 1.46kgPackaged Length = 135mmEffective Thread Length (metric) = 24mmMax Drilling Thickness (metric) = 12mmType of Recess = PhillipsHeight = 5.5mmLength = 55mmMaterial = Bi-Metal/A2-304 Stainless Steel/Carbon SteelType of Point = Self-Drilling No.5Width = 5.5mmHead = Countersunk with RibsPTDTIMBMHW55

General description These TIMCO Self-Drilling Wing-Tip Steel to Timber Heavy Section A2 Stainless Steel Bi-Metal Screws are specifically designed for attaching wood to metal, with a maximum thickness of 12mm. The unique wing design allows for efficient reaming of timber, enabling the screw to achieve maximum revolutions per minute (R.P.M.) without overheating. Once the wings contact the metal, they break off, allowing the screw to self-tap effectively. Technical specifications Dimensions: 5.5 x 55 mm Material: A2 Stainless Steel Thread type: Metric thread Maximum thickness for wood attachment: 12 mm