Metallics JSBH801 Bolts 5/8-11 X 4 Hxbt SS (Jar 25)

The JSBH801 is a 5/8-11 hex bolt, 4 inches long, with 11 threads per inch, which is standard UNC coarse pitch for 5/8 inch. Any standard 5/8-11 coarse nut threads on. Measured shank outside diameter runs 0.6170 to 0.6250 inches.

18-8 stainless is the material here, and it is meant for general atmospheric corrosion resistance, the kind of exposure you get on rooftop equipment, food-processing rooms and wash-down areas. Aggressive chemical exposure, chlorides or marine spray is a different story: that calls for 316 stainless or another specified alloy, not 18-8.

No. These hex bolts are not Buy American compliant and are not ARRA compliant, and country of origin is listed as multiple. For federally funded work carrying domestic sourcing requirements you need a domestically sourced fastener instead.

Across the flats the hex head measures 0.922 to 0.938 inches, so a 15/16 inch socket or wrench is the fit. Head height is 25/64 inch, which matters if you are working in a shallow channel or under a strut clamp.

Tensile 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 puts it in the same general tensile territory as a Grade 5 carbon steel bolt but with lower yield, so it is chosen for corrosion resistance rather than for maximum clamp load. For high-preload structural connections, a rated carbon steel bolt is the better call.

The JSBH801 ships as a jar of 25 bolts, and 25 each is the order minimum, so the jar is the smallest unit. Metallics lists other sizes and quantities in this hex bolt line on request.

Both are austenitic stainless and both are used where general atmospheric corrosion resistance is needed. The JSBH801 is the 18-8 version, which covers most indoor, rooftop and food-processing work. Where the environment involves aggressive chemicals, 18-8 is not enough and you should specify 316 or another corrosion resistant alloy with the precautions that come with it.

They are stocked for electrical, plumbing, heating and air conditioning work: hanging and anchoring equipment, strut and bracket connections, and any spot where a plated bolt would rust out. The stainless material also suits chemical and food-processing equipment where general corrosion resistance is required.