Metallics 10 x 1-1/4 in. 5/16 Indented Hex Head Slotted Sharp Point Tapping Screws - 18-8 Stainless - Each

Mechanically yes, but watch the metals. Metallics warns that fastening 18-8 stainless parts to aluminum or steel can set up a galvanic couple, a form of corrosion, in some environments. On exterior or damp work where dissimilar metals are in contact, isolate the joint or pick a fastener that matches the base metal. Indoors and dry, the 18-8 stainless is the corrosion-resistant choice.

It is a Type A tapping screw with a gimlet (sharp) point, not a self-drilling screw. The sharp point starts easily in thin sheet metal, but it does not drill its own hole in heavier stock, so pilot-drill anything thicker than light gauge sheet.

No. The #10 Type A tapping screw runs 12 threads per inch, a coarse spaced thread for forming its own thread in sheet metal. That will not mate with a tapped #10-24 or #10-32 machine thread. If you are threading into an existing machine-tapped hole or a nut, order a machine screw instead.

No. The JDS183SS is listed as not Buy American compliant and not ARRA compliant, with country of origin reported as multiple. For federally funded or domestic preference work, you need a domestically sourced fastener instead.

Two options, which is the point of the head. The hex is 5/16 across the flats (0.305 to 0.312 in. head width, 0.34 across corners), so a 5/16 nut driver or socket seats on it. There is also a slot in the top, 0.050 to 0.060 in. wide and 0.057 to 0.072 in. deep, for a flat blade when you cannot get a socket on the head.

The indented hex head carries an integral washer section with an OD of 0.384 to 0.414 in. and a thickness of 0.019 to 0.031 in. That bearing surface spreads load on sheet metal and over slotted strut or box holes, so you usually do not need a separate flat washer. Head height is 0.105 to 0.120 in.

Yes. Head and washer dimensions are built to ASME B18.6.3-2010 and the thread to ASME B18.6.4, so the part is dimensionally interchangeable with any other screw made to those standards. One caveat Metallics states: dimensions for #9 diameter are independent of ASME B18.6.4.

Yes. The JDS183SS is the #10 by 1-1/4 in. configuration, and Metallics makes other diameters and lengths in the same indented hex head slotted Type A pattern, available by request along with other pack quantities.

They ship in a jar of 100 as the minimum order quantity. The jar weighs 0.87 lbs and measures 3 in. by 3 in. by 2.7 in., so it drops into a van bin or a service cart without repacking.

They are heat treated to Rockwell C28-38, which is the case range for a tapping screw expected to form threads in sheet steel rather than just hold in soft material. Keep the drive speed down and the torque controlled, since 18-8 stainless will gall if you overdrive it.