Metallics TEK4PM 10 x 1/2 in. Pan Head Phillips Self-Drilling & Tapping Screws - #2 Drill Point - Steel Zinc - Each

The TEK4PM is rated for panel thickness of 0.035 to 0.110 in. That covers light gauge steel studs, strut, duct flange, and sheet metal enclosures. Go thicker than 0.110 in and the #2 drill point won't clear the hole before the threads engage, which snaps points. For heavier steel you need a longer drill point (#3 or higher).

No. It's a Type BSD self-drilling and tapping screw, so the drill point makes its own hole and the threads tap it in one pass. Just hold it square and let the point cut through before you drive down, within the 0.035 to 0.110 in panel range it's rated for.

Yes, the TEK4PM is flagged compliant for both Buy American and ARRA. That is the answer procurement departments on federal, school, and municipal work need on the submittal.

A #2 Phillips bit. The drive is Phillips with a 0.192 in recess diameter and a recess penetration gaging depth of 0.089 to 0.113 in, so a standard #2 insert bit seats fully. Don't confuse the driver size with the drill point, both happen to be #2 on this screw.

Minimum torsional strength is 61 lb-in, with the screw case hardened to Rockwell C32-40. In practice that means setting your impact or screw gun clutch low: these will drill and tap light steel well inside that figure, and overdriving past seating is what shears heads off, not the material.

Pan head sits proud of the surface, it does not countersink. Head width runs 0.357 to 0.373 in with a head height of 0.122 to 0.133 in, so you get a broad bearing surface that clamps sheet metal and strap without pulling through. If you need a flush surface, such as under a cover plate or a sliding part, order a flat or wafer head instead.

Head dimensions follow ASME B18.6.3-2010 and the thread follows SAE J78 - 2013. Thread is UNC at 16 threads per inch on the #10 diameter. Note that SAE J78 does not cover #7 diameter drill screws, so if your spec calls out a #7 you won't find it under that standard.

Steel with a zinc finish, silver in appearance. Zinc plating is a mild corrosion coating meant for dry interior work, electrical enclosures, panel and strut assembly inside a building. For exterior, coastal, or damp locations, specify stainless or a coated exterior drill screw instead, plated steel will rust at the drilled hole where the point cuts fresh metal.

The 1/2 in. length leaves enough thread past the point to tap and hold within the rated 0.035 to 0.110 in panel thickness, which covers stacking two light gauge pieces at the thin end of that range. Once total stack goes past 0.110 in, move up to a longer screw with a bigger drill point, since the flute has to clear the far side of the metal before threads bite.

They ship in a jar of 1,000, and 1,000 is the order minimum. The jar weighs 4.46 lbs. If you need a different size or count, other sizes and quantities are available by request.