Metallics TEKD675 10 x 3/4 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

No. The TEKD675 is a Type BSD self-drilling and tapping screw, meaning the point drills its own hole and the thread taps it in one pass within the 0.035 to 0.110 inch panel range. Per the Metallics data, drill time is about 2.5 seconds through a 1 mm plate. One driver, no pilot bit.

Yes, it is a hex washer head, so the washer is integral to the screw and nothing separate gets ordered. Washer outside diameter runs 0.384 to 0.414 inch with a thickness of 0.019 to 0.031 inch. That flange spreads the clamp load over sheet metal and slotted holes without needing a loose washer on the job.

They ship as a jar with an order minimum of 750 count, at 4.76 lbs for the container. It is a bulk pack meant for electrical, plumbing and HVAC work rather than a small handful.

The TEKD675 is specified at 61 lb-in minimum torsional strength with a case hardness of Rockwell C32-40, built to AISI 1016-1024 steel. That is the SAE J78 minimum for the size, and the same minimum torque applies to stainless and steel self-drillers. Breakage on these usually comes from over-torquing with a high-impact gun after the screw has seated, not from the screw itself, so back the clutch off once the washer pulls tight.

The TEKD675 is zinc plated carbon steel, which is a dry indoor-use finish. It is fine for interior sheet metal, panel and duct work, but for exterior, wet locations or coastal exposure you want a stainless self-driller or a coated exterior-rated screw instead, since zinc plating on steel will corrode once it stays wet.

Metallics lists the TEKD675 as both ARRA compliant and Buy American compliant, with country of origin recorded as multiple. For federal, state or institutional jobs with domestic-content language in the spec, those are the two compliance flags the submittal usually asks for on a fastener line item.

Threads are to SAE J78-2013 and head dimensions to ASME B18.6.3-2010, with steel per AISI 1016-1024. Thread count is 16 per inch, which is the standard #10 self-drilling thread. If your drawing calls for a J78 Type BSD #10 drill screw, this matches the callout.

At 3/4 inch overall length with a #2 drill point, the TEKD675 has enough shank to drill and thread through a combined stack inside the 0.035 to 0.110 inch panel thickness range, with thread left to engage. If your total stack exceeds 0.110 inch, step up to a longer screw with a larger drill point rather than forcing this one.