Metallics JSBH811 Bolts 1/2-13 X 3/4 Hxbt SS (Jar 100)

It's a 1/2-13 x 3/4 inch hex bolt, so 1/2 inch diameter with 13 threads per inch (standard UNC coarse thread for that diameter) and a 3/4 inch shank length under the head. Measured body diameter runs 0.4930 to 0.5000 inch. It'll thread into any 1/2-13 tapped hole, strut nut, or channel nut without an adapter.

The JSBH811 is 316 stainless steel. Both 18-8 and 316 are austenitic, but the molybdenum in 316 gives it greater corrosion resistance than 18-8 plus better strength at elevated temperature. That's the grade you want for coastal, wastewater, pool chemical, roof-mounted, or washdown work where 18-8 will eventually pit.

At 3/4 inch of shank under the head, this bolt is for thin connections: strut and channel nuts, hanger and clamp hardware, equipment feet, panel and enclosure mounting. Add up your material thickness plus any washers and leave threads engaged in the nut. If the stack is more than about half an inch you need a longer bolt, and Metallics lists other lengths in the same SBHC and JSBHC hex bolt series.

The hex head measures 0.736 to 0.750 inch across the flats, so a 3/4 inch wrench or socket is the right size. That's the standard head across-flats for a 1/2 inch hex bolt, so it matches the other 1/2 inch hardware in a fitter's kit.

The JSBH811 is rated at 100,000 to 150,000 psi minimum tensile with 65,000 psi minimum yield, and hardness of Rockwell B95 to C32. That's in the neighborhood of a grade 5 steel bolt in tensile, but you're buying it for corrosion resistance, not for maximum strength. If the connection is strength-critical and dry, a hardened alloy bolt is the better structural choice; for wet, chemical, or exterior service the stainless is what survives.

They ship as a jar of 100 pieces, and the jar is the minimum order unit, so 100 is the smallest quantity. Metallics notes other sizes and quantities are available by request if a job needs a different length or a bulk count.

No. The JSBH811 is not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. On federally funded or domestic-preference jobs you'll need a domestic-sourced fastener instead, so flag this one before it goes into a government or transit submittal.

Yes. Metallics lists this hex bolt for the electrical, plumbing, heating and air conditioning industries, which is where the 1/2-13 size shows up most: strut and trapeze hangers, unistrut nuts, equipment and pump mounting, and pipe clamp hardware. The 316 stainless makes it the pick for mechanical rooms, rooftops, and anywhere wet.