Metallics JTEKD13V 10 x 1 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #3 Drill Point - Steel Zinc - Each

The #3 drill point on the JTEKD13V is rated for panel thicknesses of 0.110 to 0.175 inch, so it drills and taps its own hole in steel in that range in one pass. Thinner sheet than 0.110 inch generally calls for a smaller drill point, and heavier stock than 0.175 inch is outside what this point is designed to cut.

The JTEKD13V is a #10 diameter with 16 threads per inch in UNC form and a 1 inch length, hardened to Rockwell C32-40 with a 61 lb-in minimum torsional strength. That combination is built for fastening into steel panels in the 0.110 to 0.175 inch range, which covers common strut and box gauges in that band. The 1 inch length gives you room for the drill point plus thread engagement behind the panel.

Metallics lists the JTEKD13V as both ARRA compliant and Buy American compliant, which is what a public-works or federally funded project submittal asks for. Country of origin is listed as multiple.

It takes a 5/16 hex driver. The indented hex washer head measures 0.305 to 0.312 inch across the flats and 0.34 across the corners, which is a standard 5/16 socket or magnetic nutsetter in a screw gun.

It is an integral washer head, not a separate bonded washer. The washer face runs 0.384 to 0.414 inch outside diameter with a 0.019 to 0.031 inch thickness, so it spreads bearing load across sheet metal and strut. There's no rubber or EPDM gasket, so it isn't a weather-seal roofing screw.

They ship in a jar of 500 pieces, which is the order minimum. Useful to know if you're stocking a service van or an MRO crib rather than buying by the handful.

Dimensions are to ASME B18.6.3-2010, threads to SAE J78-2013, and the steel is AISI 1016-1024. It's a Type BSD self-drilling and tapping screw. Worth noting for spec writers: SAE J78 does not cover #7 diameter drill screws, so if your drawing calls out a #7 you'll be working outside that thread standard.

The JTEKD13V is carbon steel with a zinc finish and a silver head, which is a general indoor and protected-exterior coating. For sustained wet exposure, coastal air, or chemical environments, a stainless self-drilling screw is the better call. Torque requirements are the same either way, so swapping to stainless doesn't change your driver setup.

Head height runs 0.105 to 0.12 inch on the JTEKD13V. That's a low indented hex washer head, so it sits close to the panel and clears most cover plates and enclosure doors, but it is not a flush or countersunk head. If your detail needs the fastener fully flush, use a flat head screw instead.

Metallics cites a drill time of 2.5 seconds through a 1 mm thick plate. Keep steady pressure and let the point cut rather than spinning it, or you'll burn the tip before it bites.