Metallics JTEKD5SS 10 x 1/2 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - 410 Stainless Steel - Each

The JTEKD5SS is rated for panel thickness of 0.035 to 0.110 inch, which covers typical sheet metal studs, strut, duct and enclosure flanges. The #2 drill point does the drilling and the thread taps in one pass, so no pilot hole is needed within that range. Thicker steel than 0.110 inch needs a heavier drill point.

Half an inch of overall length is short. With a panel range of 0.035 to 0.110 inch, the JTEKD5SS is meant for fastening thin material directly to sheet metal, like straps, clips, box ears and duct flanges. If you are stacking two members or going through insulation or a thicker bracket, you need a longer length in the same JTEKD series rather than this one.

No. The JTEKD5SS is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. On federally funded work with domestic sourcing requirements you will need a domestically produced fastener instead.

Yes. 410 is a hardenable martensitic stainless, and these screws come in at Rockwell C38-46 with a minimum torsional strength of 61 lb-in, which is what lets the point cut steel instead of work-hardening and spinning. Metallics notes minimum torques are the same for stainless and steel self-drill screws, with roughly 2.5 seconds of drill time in a 1 mm plate.

The washer is part of the screw, an integral hex washer head, so there is nothing separate to install. Outside diameter runs 0.384 to 0.414 inch with a washer thickness of 0.019 to 0.031 inch, giving a bearing surface wide enough to seat on sheet metal without pulling through, but not wide enough to act as a sealing or fender washer.

410 stainless gives better corrosion resistance than plain zinc-plated carbon steel and is the common choice for electrical, plumbing, heating and air conditioning work where moisture is a factor. It is a martensitic grade, not a 300 series, so for coastal salt exposure or chemically aggressive environments a 300 series fastener is the better call.

16 threads per inch on a #10 diameter, built to SAE J78 for the thread and ASME B18.6.3-2010 for head dimensions. That matters if you are matching an existing spec on a drawing or need the replacement to thread into holes already tapped by the same screw.

They ship in a jar of 100, and 100 is the minimum order quantity. Metallics notes other sizes and quantities are available by request if a job needs a different count or length.

Head height is 0.105 to 0.12 inch. That is a low profile for a hex washer head, so it clears most cover plates and panel doors, but it is not flush, these are not a countersunk screw and will not sit level with the panel face.