Designed to meet the latest developments in MDF board. Tri-Lock threadform and shank incorporates the benefits of a single coarse thread with a twin thread start on the same screw. Spiral point breaks through the hard, dense surface, allowing the twin thread to engage. The twin thread is reduced to a single coarse thread, enabling high pull-out retention. Underhead ribs for self-countersinking. Zinc and yellow-passivated. Double Self-Countersunk with Underhead Ribs TS Thread System Offers a Single & Twin Thread in One, Gripping Fast with a Firm Fix Net-Coat Yellow-Plated Carbon Steel Construction Wax-Coated Partially Threaded

Price: £10.99 from Screwfix

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Stockist	Product Name	Price
Screwfix	MDF-Tite PZ Double-Countersunk Thread-Cutting MDF Screws 3.9mm x 45mm 200 Pack	£10.99	Visit Store