Metallics JTEKD10SS 14 x 1 in. 3/8 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #3 Drill Point - 410 Stainless Steel - Each

The #3 drill point is the governing spec on the Metallics JTEKD10SS. It drills and taps its own hole in structural-gauge steel without a pilot, and the manufacturer's drill-time guide cites 2.5 seconds through a 1 mm plate. Overall screw length is 1 inch, so the drill point plus thread has to clear your total stack-up and still leave thread engaged in the base metal.

No. The Metallics JTEKD10SS is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. For federally funded work carrying domestic sourcing requirements you will need a domestically produced fastener instead.

It takes a 3/8 inch hex driver. The indented hex head measures 0.367 to 0.375 inches across the flats and 0.409 across corners, so a standard 3/8 magnetic nut setter seats cleanly. Head height runs 0.172 to 0.19 inches.

410 stainless is a hardenable martensitic grade, which is what lets the point be heat treated hard enough to drill its own hole, Rockwell C38-46 here. It gives better corrosion resistance than plain carbon steel but it is not the equal of 300-series stainless in salt or chemical exposure. Fine for typical electrical, plumbing and HVAC work including sheltered exterior; for coastal or washdown, step up to a 300-series fastener.

The washer is part of the screw head on the JTEKD10SS, so there is nothing loose to hold while you drive it. Washer outside diameter is 0.480 to 0.520 inches and thickness is 0.030 to 0.050 inches, which spreads the clamp load over sheet metal and over slotted strut or hanger holes.

No, and that is a common assumption worth correcting. Minimum torques are the same for stainless and steel self-drill screws, so set your impact or screwgun clutch the same way you would for carbon steel. Drill time is 2.5 seconds through a 1 mm plate.