Metallics JTEKD6V 10 x 3/4 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

The JTEKD6V is rated for panel thickness of 0.035 to 0.110 in., so it handles light to medium gauge steel such as studs, strut, hat channel and enclosure flanges. Below 0.035 in. the #2 point can over-drill thin sheet; above 0.110 in. you need a heavier drill point.

No. This is a Type BSD self-drilling and tapping screw, meaning the drill point cuts its own hole and the thread taps it in one pass through the rated 0.035 to 0.110 in. panel range. Drill time runs about 2.5 seconds through a 1 mm plate.

Yes. 20 gauge stud falls inside the 0.035 to 0.110 in. panel range this screw is rated for. The thread is 16 threads per inch UNC, which is the coarse self-drill pitch that pulls in sheet steel, and the screw carries a 61 lb-in minimum torsional strength with a Rockwell C32-40 case hardness. If your impact driver is snapping heads, dial the torque back rather than moving up in diameter.

It drives with a hex nut setter, not a bit. The indented hex head measures 0.305 to 0.312 in. across the flats (nominally 5/16) and 0.34 in. across corners, so a standard 5/16 magnetic nut setter in a drill or impact is what you want. Head height is 0.105 to 0.12 in.

These ship 500 per jar, and 500 count is the order minimum. Metallics does offer other sizes and quantities in this line by request.

It is an indented hex washer head, meaning the washer face is integral to the head, not a separate rubber or neoprene seal. Washer OD runs 0.384 to 0.414 in. with a thickness of 0.019 to 0.031 in., which spreads load over sheet metal and oversized holes. For weathertight roof or siding work you want an EPDM-bonded sealing washer screw instead.

Material is carbon steel with a zinc plating, which is a dry-location and interior finish. Zinc plating gives limited corrosion protection and will rust in exterior, coastal or washdown service. For wet or corrosive locations choose a stainless self-drilling screw. Worth noting on torque: minimum torque values are the same for stainless and steel self-drill screws, so you do not give up driving strength by going stainless.

Metallics lists the JTEKD6V as both Buy American compliant and ARRA compliant, with country of origin recorded as multiple. If your spec requires a single named origin on the submittal, request origin confirmation on the specific lot.

Three to put on the submittal: dimensions to ASME B18.6.3-2010, threads to SAE J78-2013, and steel to AISI 1016-1024. Note that SAE J78 does not cover #7 diameter drill screws, so if your spec calls out a #7 you will not find a J78 reference for it.

At 3/4 in. overall length, the JTEKD6V leaves enough thread past a single sheet steel member to fully engage, with the washer head bearing on the bracket, box ear or strut flange. If you are stacking two members plus a thick bracket, step up in length so the drill point clears the back side before the threads bottom out. Head is silver zinc.