Metallics JTEKD23SS 14 x 3 in. 3/8 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #3 Drill Point - 410 Stainless Steel - Each

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

The #3 point is the heavier-gauge self-drill point in this family, meant to drill its own hole in structural steel rather than thin sheet. Metallics publishes a drill time of 2.5 seconds through a 1 mm plate for these screws. Pick a #2 or #1 point instead if you are only fastening into light-gauge sheet, where a heavy point can strip before it taps.

It is a #14 diameter screw, 3 inches long, of the Type BSD self-drilling and tapping style. That length lets you go through a strut, hanger, or wood blocking and still get full thread engagement in the steel behind it.

It is made of 410 stainless steel, which gives better corrosion resistance than plain zinc-plated carbon steel while staying hard enough to drill its own hole. 410 is a martensitic stainless, so it handles weather exposure and damp mechanical rooms, but it is not the choice for coastal salt spray or chemical exposure where 300-series stainless is specified.

The washer is integral to the head, with an outside diameter of 0.480 to 0.520 inch and a thickness of 0.030 to 0.050 inch. It is a bonded hex washer head for load spreading, not a rubber EPDM roofing seal, so it is not a substitute for a sealing washer on exposed roof panels.

Dimensions follow ASME B18.6.3-2010 and the thread conforms to SAE J78-2013. Those are the two specs a submittal usually calls for on hex washer head self-drill screws, so the JTEKD23SS can be cited directly on a spec sheet.

No. The Metallics JTEKD23SS is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. If your contract carries a domestic sourcing clause, this part will not satisfy it.

Case hardness is Rockwell C38-46, which is what lets the drill point cut steel before the threads tap. Run them at a moderate screwgun speed with steady pressure; spinning a hardened point without feed pressure is what burns it up, not the material.

They ship in a jar, with a minimum of 100 pieces per jar. A full jar weighs 3.32 lbs.

Metallics lists this screw for the electrical, plumbing, heating and air conditioning industries. In practice that means hanging strut, conduit clamps, duct supports, and equipment brackets onto steel framing, where the 3 inch length spans standoffs and the hex washer head seats against the part being fastened.