Metallics JSBH39D Bolts 1/2-13 X 2-1/4 Hxbt SS (Jar 50)

The JSBH39D is a 1/2-13 hex bolt, so 13 threads per inch, which is the standard UNC coarse pitch for 1/2 inch diameter. Any standard 1/2-13 nut or tapped 1/2-13 hole will accept it. Measured shank diameter runs 0.4930 to 0.5000 in.

It is made from 18-8 stainless steel, an austenitic alloy used where general atmospheric corrosion resistance is needed, including chemical and food-processing equipment. Aggressive chemical exposure (strong chlorides, acids) can call for 316 or a specialty alloy instead, so match the alloy to the environment rather than assuming 18-8 covers everything.

No. The JSBH39D is listed as not Buy American compliant and not ARRA compliant, even though country of origin is shown as United States. If your contract carries a domestic-sourcing clause, this is not the part to put on the submittal.

Head width across flats is 0.736 to 0.750 in., so a 3/4 inch wrench or socket is the one to grab.

Tensile strength on the 18-8 stainless bolt is 100,000 to 150,000 psi minimum with 65,000 psi minimum yield, and hardness runs Rockwell B95 to C32. A carbon steel SAE grade 5 is rated 120,000 psi tensile and 92,000 psi yield, so stainless trades some yield strength for corrosion resistance. For structural load paths, confirm the engineer accepts a stainless fastener before substituting.

They ship in a jar of 50 pieces, and 50 count is the order minimum, so it is a one-jar-at-a-time item rather than loose pieces. Handy for a service truck or a shop bin. Other sizes and quantities can be had by request.

The JSBH39D is catalogued as electrical-supply hardware and 18-8 stainless is austenitic, so it is non-magnetic and corrosion resistant, which is why these show up on outdoor enclosures, strut, and equipment pads. Stainless is a poorer conductor than copper or plated steel, so for a listed grounding connection use the bonding hardware the equipment listing calls for and keep this bolt for mechanical mounting duty.