Metallics JSBH35 Bolts 1/2-13 X 3 Hxbt SS (Jar 50)

The JSBH35 is a 1/2-13 by 3 inch hex bolt, so 13 threads per inch on a 1/2 inch coarse (UNC) thread. Any standard 1/2-13 UNC nut or tapped hole will take it. Measured shank outside diameter runs 0.4930 to 0.5000 inches.

The JSBH35 is 18-8 stainless, an austenitic alloy suited to general atmospheric corrosion resistance, the sort of exposure you get on chemical and food-processing equipment. It handles ordinary outdoor and damp conditions. Aggressive chemical environments, and coastal or chloride exposure, are where you step up to 316 stainless instead.

No. The JSBH35 is not Buy American compliant and is not ARRA compliant; country of origin is listed as multiple. On a federally funded project with domestic sourcing requirements, this bolt will not qualify and you need a domestic-origin fastener instead.

Tensile strength on the JSBH35 runs 100,000 to 150,000 psi minimum with a 65,000 psi minimum yield, and hardness falls in the Rockwell B95 to C32 range. That is respectable for stainless, but a plated SAE Grade 5 carbon bolt is rated 120,000 psi tensile with a 92,000 psi yield, so if the connection is governed by yield rather than corrosion, carbon steel is the stronger pick. Choose the stainless when the environment is the problem.

It ships as a jar of 50 pieces, and 50 each is the order minimum. Smaller counts are not broken out of the jar. Metallics does offer other sizes and quantities in this hex bolt line by request.

It is a general purpose structural and equipment fastener for the electrical, plumbing, and HVAC trades: strut and channel connections, hanger and support steel, equipment anchoring, and mounting on food-processing or chemical equipment where a plated bolt would rust out. At 3 inches long it suits stacked assemblies and thicker members, not thin sheet work.