Metallics JTEKD66 6 x 2 in. 1/4 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

The JTEKD66 is rated for panel thickness of 0.035 to 0.090 inch, so it drills and taps its own hole in light gauge steel in that range. Thicker steel than 0.090 inch is outside what this #2 drill point is specified for, and you would want a heavier drill point or a pre-drilled and tapped hole instead.

Thread is 20 threads per inch on a #6 diameter shank, with an overall fastener length of 2 inches. The thread conforms to SAE J78 - 2013 and head dimensions to ASME B18.6.3-2010, so it interchanges with other Type BSD drill screws built to those standards.

No. Type BSD means the screw drills its own hole and taps its own thread in one pass, so no pilot hole and no separate tapping step. That is the main reason to choose it over a sheet metal screw, which needs a drilled hole first. The trade-off is that the point only works within the rated 0.035 to 0.090 inch panel thickness.

Hex drive, and the head is a 1/4 inch indented hex measuring 0.244 to 0.250 inch across the flats, 0.272 across the corners. A 1/4 inch magnetic hex driver bit in a screw gun is what installers run these with. Head height is 0.080 to 0.093 inch.

They ship in a jar with a 100 count minimum order. Jar weight is 0.67 lbs.

The washer is part of the assembled fastener, sized 0.302 to 0.328 inch outside diameter and 0.015 to 0.025 inch thick. That bearing surface is what spreads load on thin sheet so the head does not pull through, which matters when you are fastening straps, brackets or box supports to light gauge steel. No separate washers to buy.

Finish is zinc plated carbon steel (AISI 1016-1024). Zinc plating handles indoor and sheltered conditions, interior framing, mechanical rooms and electrical rooms. For sustained exterior exposure, salt air, or direct wetting, a stainless self-drilling screw is the better call since zinc plating is a sacrificial coating, not a corrosion-proof one.

Case hardness runs Rockwell C32-40 with a 24 lb-in minimum torsional strength, which is what lets the point cut steel without the shank twisting off. Metallics notes drill time of 2.5 seconds through a 1 mm plate, and minimum torques are the same for stainless and steel self-drill screws. Run it at drill speed with steady pressure, not with an impact driver cranked down.

The JTEKD66 is flagged Buy American compliant and ARRA compliant in the product record. Country of origin is China. Agency and institutional buyers writing domestic-preference specs should run both of those facts past their compliance reviewer for the specific funding source.