Metallics JSBH601 Bolts 7/16-20 x 1-1/4 HXBT SS (Jar 50)

Fine thread. The JSBH601 is a 7/16-20 hex bolt, so it runs 20 threads per inch, which is the UNF pitch for 7/16 diameter rather than the 14-per-inch coarse (UNC) version. It will not start in a 7/16-14 coarse nut or tapped hole, so match your nuts and any tapped strut or enclosure threads to 20 TPI before ordering.

The JSBH601 is 18-8 stainless, an austenitic alloy used where general atmospheric corrosion resistance is needed, including chemical and food-processing equipment. That covers exterior conduit runs, damp mechanical rooms and wash-down equipment. It is not the answer for chloride-heavy or aggressive chemical exposure, coastal splash or pool chemistry included; those calls typically go to 316 stainless or another specified corrosion-resistant alloy.

Head width across the flats runs 0.612 to 0.625 inch, so a 5/8 inch wrench or socket is the fit. Shank outside diameter is held to 0.4305 to 0.4375 inch, which is the standard 7/16 range, so it drops through a 7/16 clearance hole without reaming.

Tensile runs 100,000 to 150,000 psi minimum with a 65,000 psi minimum yield, and hardness is Rockwell B95 to C32. That puts it in the same general tensile band as a medium-strength carbon bolt, but the yield is lower, so stainless stretches sooner under load. Where the engineer has called out a structural grade by number, use the specified carbon fastener; where the driver is corrosion rather than clamp load, this is the part.

The JSBH601 ships as a jar of 50 bolts. The stated order minimum is 100 count, so plan on two jars as a base order. Metallics notes that other sizes and quantities in this hex bolt line are available by request.

Metallics flags the JSBH601 as both Buy American compliant and ARRA compliant. Country of origin is listed as multiple, so the sourcing varies by production run; if your specification requires documentation on the specific lot, request it with the purchase order.

Any 7/16-20 nut will thread on, but pair stainless with stainless. Running an 18-8 bolt into a plated carbon nut in a wet location sets up dissimilar-metal corrosion and defeats the reason you bought stainless. Coarse 7/16-14 nuts will not engage at all, since this bolt is cut at 20 threads per inch. An anti-seize on the threads is worth the minute; austenitic stainless galls easily when run down fast.