Metallics JSHTB64D Bolts 3/8-16 x 1-3/4 Hx Tap Blt SS (Jar 25)

It is a 3/8-16 x 1-3/4 inch hex tap bolt, so 3/8 inch diameter with 16 threads per inch (UNC coarse) and a 1-3/4 inch shank. Tap bolt means it is threaded full length rather than having a plain shoulder, so it will pull up tight in a tapped hole or through a thin assembly without worrying about grip length.

The bolt is 18-8 stainless steel, the standard austenitic grade used for wet, humid, and exterior work where a plated carbon steel bolt would rust. It is a reasonable pick for outdoor strut, enclosure mounting, and damp mechanical or electrical rooms. For direct salt spray or coastal exposure, 316 stainless is the step up.

Rated at 95,000 psi minimum tensile and 60,000 psi minimum yield, with a hardness of Rockwell B95 to C32. That is typical 18-8 stainless territory, below a Grade 5 or Grade 8 carbon steel bolt. Fine for equipment mounting, strut, hangers, and general MRO fastening where corrosion resistance matters more than maximum strength. If the drawing calls out a specific SAE or ASTM structural grade, spec that instead.

Yes. The JSHTB64D hex tap bolt is flagged Buy American compliant and ARRA compliant, with country of origin listed as the United States. That covers the usual domestic-content questions on government, school, and federally funded institutional work.

Head width runs 0.544 to 0.562 inch, which is a 9/16 inch socket or wrench, the usual size across the flats on a 3/8-16 hex bolt. Head height measures 0.226 to 0.268 inch.

They ship 25 to a jar, and 25 count is the order minimum. The jar packaging keeps them together on a service truck or a shop shelf rather than loose in a bag. Metallics does make other sizes and quantities in the HTB, JHTB, and JSHTB tap bolt series available by request.

Threads are produced to IFI-199 (2014). In practice that means a standard 3/8-16 UNC thread that will mate with any off-the-shelf 3/8-16 nut, tapped hole, or strut channel nut.

A tap bolt is threaded the full length of the shank, which is what you want when you are threading into a tapped hole, a channel nut, or stacking washers and shims where the grip length keeps changing. A partially threaded hex cap screw puts a smooth shoulder through the joint, which is preferred for shear applications and where you want the unthreaded body bearing in the hole. At 1-3/4 inches of length, the full thread on this one keeps it usable across a range of assembly thicknesses.