Metallics JTEKD19V 10 x 1-1/2 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

The Metallics JTEKD19V is rated for panel thickness of 0.035 to 0.110 in., which is the range its #2 drill point will self-drill and tap in one pass. That covers light gauge steel studs, strut, and sheet metal. Thicker structural steel is past the point's capacity, so for heavier base metal you need a higher drill point number or a pre-drilled and tapped hole.

It cuts a 16 threads per inch UNC thread to SAE J78-2013, standard for a #10 self-drilling and tapping screw. The drill point forms and taps its own hole as it goes, so in light gauge steel studs inside the 0.035 to 0.110 in. panel range it creates its own mating thread, no nut or anchor needed. In very thin stock only one or two threads engage, so keep the fastener count up rather than relying on a single screw.

A 5/16 in. hex driver. Head width across the flats measures 0.305 to 0.312 in. and width across corners is 0.34 in., so a standard 5/16 magnetic nut setter in a drill or impact driver seats it. There is no cross or square recess on it; the hex head is the only drive.

It is a hex washer head screw with an integral steel washer, not a rubber or EPDM sealing washer. Washer outside diameter runs 0.384 to 0.414 in. and washer thickness 0.019 to 0.031 in., which spreads the clamp load on sheet metal. For weather sealing on exterior roof or wall panels you want a screw with a bonded neoprene washer instead.

Zinc plated carbon steel, AISI 1016 to 1024, is a dry interior finish. It handles damp interior and short exterior exposure, but in persistent weather, coastal air, or treated lumber contact the plating gives out and the screw rusts. For those jobs step up to a stainless or coated self-drilling screw. Minimum driving torques are the same for stainless and steel self-drill screws, so switching material does not change the driver you use.

Torsional strength is 61 lb-in minimum with a case hardness of Rockwell C32-40, which is what lets the point drill without the shank twisting off. That said, torsional ratings are the breaking threshold, not a target. High-torque impact drivers can exceed it once the head seats, so back off as the washer pulls down rather than driving to stall.

The JTEKD19V is flagged compliant for both Buy American and ARRA, with country of origin listed as multiple. Dimensionally it is built to ASME B18.6.3-2010 with threads to SAE J78-2013, which are the designations a spec reviewer will look for on a submittal.

They come in a jar, with an order minimum of 500 count. Shipping weight on the jar is 5.1 lbs. That is a bulk production pack, suited to a crew fastening strut, box supports, or stud framing rather than a one-off repair.

Head height is 0.105 to 0.12 in., plus a washer 0.019 to 0.031 in. thick under it. That is a low profile for a hex washer head, but it does sit proud of the panel. Where a flush surface matters, such as under a finished trim piece or behind a cover plate, a flat or pan head self-drilling screw is the better choice.