Metallics QTEKD20V 12 x 3/4 in. 5/16 Head Quadrive Self-Drilling & Tapping Screws - #3 Drill Point - Domestic Steel Zinc - Each

No pilot hole needed. The Metallics QTEKD20V is a self-drilling, self-tapping screw with a #3 drill point, so it cuts its own hole and threads in one pass through steel. At 3/4 inch overall length, usable grip is short, so it suits attaching strap, clips, box brackets, or thin plate to a stud or channel rather than stacking thick material.

It takes a 5/16 inch hex driver or socket on the head, and the head is also Quadrive, meaning a square recess is cut into it so a #2 square bit will drive it as well. That matters in tight spots where a hex driver and nut setter will not clear.

Material is domestic steel with a zinc plating. That is a standard dry-interior finish, fine for conduit straps, panels, boxes, and strut inside a building. For exterior, damp, or coastal work, specify a stainless or coated exterior-rated self-driller instead; plain zinc will bloom white rust outdoors.

Yes, the QTEKD20V is made in the USA from domestic steel, which is what lets it be used on jobs carrying Buy American or domestic-content material requirements. Public agency, school, and federal work frequently asks for that on fasteners.

That is the normal use for it. The #12 diameter gives enough shank strength for one-hole and two-hole straps, strut clips, and device box brackets, and the 5/16 hex head seats flat against the strap without a washer. Where you are fastening into wood framing or a wood backer instead, use a wood or sheet metal screw with a sharp point; a drill point wastes travel in wood.

It stands proud. A 5/16 hex washer head bears on top of the material rather than countersinking, so the QTEKD20V is for surface-mounted items such as straps, clips, and plates. If you need the fastener below the surface, choose a flat or trim head self-driller instead.

Metallics part number QTEKD20V covers the #12 x 3/4 inch, 5/16 head Quadrive self-drilling and tapping screw with the #3 drill point in domestic steel zinc. One model, no finish or length options to pick.