With the core strength of a high tensile bolt, screw should not snap and in most applications, theres no need to pilot. Double collar offers strength at the most vulnerable point and TS thread provides the benefit of a single and a twin thread on one screw for a fast, balanced start combined with high pull-out retention. Double Self-Countersunk with Underhead Ribs Carbon Steel Construction Net-Coat Yellow-Plated Wax-Coated Partially Threaded TS Thread System Offers a Single & Twin Thread in One, Gripping Fast with a Firm Fix

Price: £39.99 from Screwfix

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Stockist	Product Name	Price
Screwfix	Screw-Tite PZ Double-Countersunk Trade Pack 800 Pieces	£39.99	Visit Store