Metallics JTEKD27 6 x 1 in. 1/4 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

The JTEKD27 is rated for panel thicknesses of 0.035 to 0.090 inch, so it drills and taps its own hole in light to medium gauge sheet steel without a pilot hole. Thicker plate is outside the range for the #2 drill point. Manufacturer data cites a drill time of about 2.5 seconds in a 1 mm thick plate.

Nominal 6 diameter by 1 inch long, with 20 threads per inch in a UNC thread form. Thread conforms to SAE J78 - 2013 and the dimensions to ASME B18.6.3-2010, so it interchanges with other Type BSD self-drill screws built to those standards.

A 1/4 inch hex driver. The head is an indented hex washer head measuring 0.244 to 0.25 inch across the flats and 0.272 inch across corners, with head height of 0.08 to 0.093 inch. No bit or Phillips tip needed, which is why these run well off a screwgun or impact driver on repetitive panel and strut work.

It is an integral washer head, nothing separate to stock or stack. The washer flange outside diameter runs 0.302 to 0.328 inch with a thickness of 0.015 to 0.025 inch, which spreads the clamp load over sheet metal and helps seat flat against a panel or box flange.

These ship in a jar of 100, and 100 count is the order minimum. Useful quantity for a service van or an MRO shelf where you are pulling a handful per job rather than buying a bulk carton.

The JTEKD27 is carbon steel with a zinc plated finish, which handles indoor and protected applications. Zinc plating is a sacrificial coating, not a marine or constant wet exposure finish, so for exterior or washdown work step up to a stainless self-drill screw instead.

Minimum torsional strength is 24 lb-in, with case hardness at Rockwell C32-40. That hardness is what lets the point cut steel; it also means the screw will shear rather than bend if you keep driving after it seats, so back the clutch off on an impact driver. The same minimum torque figure applies to stainless and steel self-drill screws of this type.

The JTEKD27 is flagged compliant for both ARRA and Buy American requirements in the manufacturer data, which is what a government, school, or healthcare procurement file usually needs on a fastener line item. Country of origin is listed as multiple.

Type BSD means the screw forms its own hole and its own thread in one pass, so there is no drilling, no tapping, and no separate anchor. On electrical work that covers fastening boxes, straps, raceway, enclosures and hangers to sheet steel studs, deck, and strut. Where the substrate is thicker than the 0.035 to 0.090 inch panel range of the JTEKD27, drill and use a machine screw instead.

Order as Metallics JTEKD27, in the JTEKD series of indented hex washer head self-drill screws. Other sizes and quantities in the same series are available by request, so once this diameter and length works on your job you can match longer lengths off the same part family.