Metallics JTEKD91AF 9 x 1-1/2 in. 1/4 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

Yes. The Metallics JTEKD91AF is a Type BSD self-drilling and tapping screw with a #2 drill point, so it drills its own hole and cuts its own thread in one pass. No pilot drilling, no separate tap. The point size governs how thick a plate it will cut; per the product data, drill time is about 2.5 seconds through a 1 mm thick plate.

A 1/4 inch hex driver or nut setter. The head is an indented hex with hex drive, so it runs off a magnetic 1/4 in. nut setter in a screw gun or impact driver. No bit tip to cam out, which is why electricians use this head for strut, hangers, and sheet metal work overhead.

No. The JTEKD91AF is listed as not Buy American compliant and not ARRA compliant, with country of origin shown as multiple. If your job carries a domestic-content requirement, you need a fastener certified to it instead of this one.

The washer is part of the assembly. The JTEKD91AF is supplied as a hex washer head screw, so you do not order loose washers to go with it. That bearing surface spreads the clamp load, which matters when you are fastening sheet metal or strap to steel and do not want the head pulling through.

They ship in a jar of 100, and 100 count is the order minimum. If you need a different size or a different count, Metallics states other sizes and quantities are available by request.

Treat them as interior or protected-location hardware. The JTEKD91AF is carbon steel with a zinc plated finish, which handles ordinary indoor humidity but is not a stainless or coastal-exposure fastener. For wet, exterior, or corrosive duty, specify a stainless self-drilling screw instead. Worth noting on torque: minimum torques are the same for stainless and steel self-drill screws, so switching material does not change your driving spec.

Dimensionally they are built to ASME B18.6.3-2010, threads to SAE J78-2013, with steel per AISI 1016-1024 and a case hardness of Rockwell C32-40. That hardness range is what lets the point cut steel without the threads stripping. One caveat Metallics publishes: SAE J78 does not cover specifications for #7 diameter drill screws, so the thread standard applies to the #9 diameter here.

At 1-1/2 in. of length under a #9 diameter, the JTEKD91AF is sized for stacked material, not thin single-layer sheet. Use it where you are going through a fitting, bracket, strap, or drywall layer and then into the steel. For sheet-to-sheet work with nothing to span, a shorter length in the same JTEKD series is the better call, since excess point sticking out the back becomes a snag hazard in a wall cavity.