Metallics JSHTB44D Bolts 3/8-16 X 3/4 Hx Tap Blt SS (Jar 100)

It is a 3/8-16 x 3/4 inch hex tap bolt, so 16 threads per inch on a 3/8 inch diameter. That is standard UNC coarse pitch, so it threads into any 3/8-16 tapped hole, strut nut, channel nut or hex nut. Being a tap bolt, it is threaded full length rather than having a plain shank, which is what you want for shallow tapped holes and thin channel or bracket material.

Rated at 95,000 psi minimum tensile and 60,000 psi minimum yield, with hardness from Rockwell B95 to C32. That is typical 18-8 stainless strength, below a Grade 5 or Grade 8 carbon steel bolt of the same size, so size your fastener count on the stainless values rather than assuming carbon-steel capacity. Threads are manufactured to IFI-199 (2014).

Yes. The JSHTB44D is flagged both ARRA compliant and Buy American compliant, with country of origin United States. That covers the documentation most federally funded, school district and municipal jobs ask for on fasteners.

The bolt is 18-8 stainless steel, the standard austenitic grade used for outdoor, damp and washdown work where plated carbon steel would rust. Typical uses are exterior strut and channel runs, rooftop equipment supports, and damp mechanical rooms. For salt spray or coastal exposure, 316 stainless is the harder-wearing choice, but 18-8 covers most general exterior electrical mounting.

Head width across flats measures 0.544 to 0.562 inch, which is a 9/16 inch wrench or socket. Overall head corner-to-corner dimension falls between 0.620 and 0.650 inch, worth knowing if you are driving these in a tight channel or recess.

They ship in a jar of 100 pieces, and 100 count is the order minimum. The jar weighs 1778 g filled. For a service van or a stocked MRO shelf, that is one container rather than loose bulk, which keeps the 3/8 stainless separate from the plated hardware.

The JSHTB44D is the 3/4 inch length. Metallics builds the same hex tap bolt across the HTB, JHTB and JSHTB series in other sizes and pack quantities, available by request, so if your grip plus nut needs an inch or more of thread, ask for the longer length in the same series rather than stacking washers under this one.

Both will thread a 3/8-16 channel nut. A tap bolt like this one is threaded the full 3/4 inch, so every bit of its length engages the nut, which matters on thin channel where a cap screw's unthreaded shank can leave you short on engagement. Choose the 18-8 stainless version where the run is outdoors or damp; plated carbon steel is the usual pick for dry indoor work. Note that mixing stainless bolts with plated nuts in a wet location invites galvanic corrosion, so keep the pair in the same material.