Metallics JSBH182 Bolts 1-8 x 2-3/4 HXBT SS (Jar 25)

It's a 1 inch diameter bolt with 8 threads per inch, the standard UNC coarse pitch for 1 inch stock. Measured shank diameter runs 0.9900 to 1.0000 inch, so it mates with a 1-8 nut or a tapped 1-8 hole.

The hex head measures 1.469 to 1.500 inch across the flats, so a 1-1/2 inch wrench or socket is the one you want. Head height is 39/64 inch, worth checking if you're torquing in a tight pocket or under a cover plate.

The JSBH182 is 18-8 stainless, an austenitic alloy good for general atmospheric corrosion resistance, which covers typical outdoor structural and chemical or food-processing equipment duty. Where you have chloride exposure, coastal salt spray, or aggressive chemistry, 316 is the grade to specify instead. Metallics offers both within the SBHC and JSBHC hex bolt series.

Tensile runs 85,000 to 140,000 psi minimum with a 45,000 psi minimum yield, and hardness is Rockwell B80 to C32. That's below a Grade 5 carbon steel bolt on yield, so if a drawing calls out Grade 5 or Grade 8 for a load-bearing connection, stainless is not a straight swap. You pick 18-8 when corrosion resistance drives the choice, not clamp load.

25 bolts per jar, and 25 each is the order minimum, so the jar is the buying unit. The jar packaging keeps a single size separated on a service truck or in a crib bin rather than loose in a bulk box.

The JSBH182 is flagged compliant for both Buy American and ARRA, which is what a government, school district, or municipal procurement file normally needs on fasteners. Country of origin is listed as multiple, so if your contract requires a single named origin per lot, state that on the order.

18-8 is austenitic stainless, and pairing it against aluminum or galvanized steel in a wet location sets up galvanic action at the joint. If that's your condition, isolate with a nylon or fiber washer. Against stainless or similar-potential metals there's no issue, which is the usual case in chemical and food-processing equipment work.