Metallics JSBH142 Bolts 5/16-18 X 2 Hxbt SS (Jar 100)

The JSBH142 is 316 stainless steel. The molybdenum in 316 gives it greater corrosion resistance than 18-8 and better strength at elevated temperatures, which is why it gets specified for coastal, wastewater, pool chemical and rooftop work where plain 18-8 pits.

5/16-18 by 2 inches. That is 18 threads per inch (UNC coarse), with a shank outside diameter measured at 0.3065 to 0.3125 inch and a 2 inch length. It takes a standard 5/16-18 nut or a tapped 5/16-18 hole.

No. The JSBH142 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing requirements you will need a domestic-origin 316 hex bolt instead.

The hex head measures 0.489 to 0.500 inch across the flats, so a 1/2 inch wrench or socket is the right tool. Head height is 13/64 inch, which matters if you are counting on clearance under a strut clamp or inside a shallow box.

It ships as a jar of 100 bolts, and the jar is the minimum order unit. Metallics also lists other sizes and quantities by request, so if you need a different length in the same 316 hex bolt family it can be sourced.

The JSBH142 is rated 100,000 to 150,000 psi minimum tensile with 65,000 psi minimum yield, and hardness runs Rockwell B95 to C32. That is a corrosion-first fastener, not a high-strength structural one. If your connection is load-governed rather than exposure-governed, a plated alloy bolt will carry more; if the joint sits outdoors, in a damp vault, or anywhere chlorides are present, the 316 is the one that survives.

Metallics lists it for the electrical, plumbing, heating and air conditioning industries. In practice that means strut and channel assemblies, hanger and clamp hardware, equipment mounting on rooftop units, and enclosure or rack fastening where corrosion is the deciding factor.