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.

Brand Name	MDF-Tite
Material	Carbon Steel
Manufacturer Model No	40376
Head Type	Double Self-Countersunk with Underhead Ribs
Thread System	TS Thread System Offers a Single & Twin Thread in One, Gripping Fast with a Firm Fix
Screw Coating	Wax-Coated
Screw Diameter	3.9mm
Screw Length	40mm
Screwdriver Type	PZ
Thread Length	Partially Threaded