Metallics QTEKD4 10 x 1/2 in. 1/4 Hex Head Quadrive Self-Drilling & Tapping Screws - #2 Drill Point - Domestic Steel Zinc - Each

The QTEKD4 is a #2 drill point screw, which is the light-gauge point used for sheet metal and light steel studs and track rather than structural steel. At 1/2 inch long it only has enough thread length for thin material anyway, so it suits attaching strap, clips, box mounts and plates to steel studs, track and sheet metal. Heavier steel calls for a longer screw with a #3 or larger drill point.

It takes a 1/4 inch hex driver or socket. The head is also Quadrive, so a square (Robertson) bit will drive it where a socket will not fit, which is handy inside a crowded box or close to a flange.

No. It is a self-drilling and self-tapping screw, so the drill point cuts its own hole and the threads form their own mating thread in one pass. No pilot hole, no separate tapping step.

The QTEKD4 is zinc plated domestic steel. That plating handles normal indoor and protected conditions, but it is not a stainless or hot-dip coating, so for direct weather exposure, wet locations or corrosive atmospheres choose a stainless or heavier-coated fastener instead.

Yes. The QTEKD4 is domestic steel and made in the USA, which is what lets it clear Buy American and domestic-content requirements on federal, state and institutional electrical work.

The QTEKD4 is a #10 diameter shank with a 1/2 inch length and a hex washer-style 1/4 inch head. A hex head does not countersink, so it stands proud of the surface with the washer face bearing on the material. If you need a flush finish, use a flat head or wafer head screw instead.

Ordering is by the each on the QTEKD4, model number QTEKD4, with the screws packaged in 100 count quantity.