Metallics JTEKD7M 10 x 1 in. 5/16 Indented Hex Head Self-Drilling & Tapping Screws with Washer - #2 Drill Point - Steel Zinc - Each

No. The JTEKD7M is a Type BSD self-drilling and tapping screw with a drill point, so it bores its own hole and forms its own thread in one pass. Driving it is a single operation with a 5/16 hex driver, no pilot hole and no separate tapping step.

The JTEKD7M is carbon steel (AISI 1016 - 1024) with a zinc plated finish, silver in appearance. Zinc plating is an indoor and sheltered-use coating; it will corrode in sustained wet, coastal, or washdown conditions. For exterior or damp environments specify a stainless self-drilling screw or a coated exterior fastener instead.

A 5/16 in. hex driver. The indented hex washer head measures 0.305 to 0.312 in. across the flats and 0.34 in. across the corners, so a standard 5/16 magnetic nutsetter in a drill or impact driver seats it correctly.

The integral washer runs 0.384 to 0.414 in. outside diameter with a washer thickness of 0.019 to 0.031 in., which gives a bearing surface noticeably wider than the 5/16 hex itself. That extra footprint is what keeps the head from pulling through thin gauge panels and is why this style gets used on enclosures, strut, and sheet metal brackets. No loose washer is needed.

It is a UNC machine-screw thread at 16 threads per inch, cut to SAE J78 - 2013 for self-drilling tapping screws. So a #10-16 point taps its own mating thread in steel rather than relying on a nut, though a #10-24 nut will not match it.

Torsional strength is 61 lb-in minimum with a case hardness of Rockwell C32-40, and the head geometry follows ASME B18.6.3-2010. That hardness is what lets the point cut steel; it also means the screw is brittle if over-torqued, so back the driver clutch off once the washer seats rather than running it to stall.

Metallics lists the JTEKD7M as both ARRA compliant and Buy American compliant. Country of origin is recorded as multiple, so if your specification requires a single named country of manufacture, confirm the origin on the lot you receive.

Fastener length is 1 in. measured under the washer head. With a panel at the top of its 0.035 to 0.110 in. range you still have well over three quarters of an inch of thread and drill point behind the sheet, which is why this length suits drilling through a bracket into a stud or strut. For stacked material thicker than 0.110 in. total, step up to a heavier drill point screw.

They ship in a jar of 1,000 pieces, which is the order minimum. The jar weighs 7.5 lbs and measures 4.5 in. wide by 4.5 in. long by 7.25 in. high, so it fits a gang box or van shelf without repacking.

Metallics cites a drill time of 2.5 seconds through a 1 mm thick plate. They also note minimum torque values are the same for stainless and steel self-drilling screws, so switching between the two does not change your driver setting.