Metallics JSBH81 Bolts 1/2-13 X 3/4 Hxbt SS (Jar 100)

The JSBH81 is a 1/2-13 hex bolt, meaning a 1/2 inch nominal diameter with 13 threads per inch, which is standard UNC coarse thread. Measured shank diameter runs 0.4930 to 0.5000 inch, so it drops into a 1/2 inch clearance hole and mates with any standard 1/2-13 UNC nut or tapped hole.

They are 18-8 stainless steel, an austenitic alloy used where general atmospheric corrosion resistance is needed, including chemical and food-processing equipment. For aggressive chemical exposure, 316 stainless or other special corrosion-resistant materials and precautions may be required instead.

No. The JSBH81 hex bolts are not Buy American compliant and are not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic-content requirements, you need a domestically sourced fastener instead.

Tensile strength on these runs 100,000 to 150,000 psi minimum with 65,000 psi minimum yield, and hardness is Rockwell B95 to C32. That puts them in the same general tensile range as a grade 5 cap screw, but stainless yields lower and galls more easily when tightened, so use anti-seize and torque to stainless values rather than carbon-steel values. If you need a stated structural grade for a load-bearing connection, a graded carbon steel bolt is the better specification.

They come in a jar of 100, and the jar is the order minimum, so you buy in 100-piece increments. Metallics also offers other sizes and quantities in the SBHC and JSBHC hex bolt series by request.

Yes. 18-8 and 316 stainless cap screws are both austenitic alloys, so they are metallurgically compatible and mixing them in a joint does not set up the kind of galvanic problem you get pairing stainless with plain carbon steel. Where the environment is chemically aggressive, go to 316 throughout rather than mixing.