Metallics JSBH808 Bolts 5/8-11 X 6 Hxbt SS (Jar 25)

It's a 5/8-11 by 6 inch hex bolt, so 11 threads per inch on a 5/8 inch coarse thread, with a 6 inch shank length under the head. Measured shank diameter runs 0.6170 to 0.6250 inch. If your equipment is tapped 5/8-18 fine thread, this won't thread in.

The hex head measures 0.922 to 0.938 inch across the flats, which is a 15/16 inch wrench or socket. Head height is 25/64 inch, so allow for that plus your washer stack when you figure grip length.

18-8 austenitic stainless handles general atmospheric corrosion, which covers outdoor rooftop equipment, damp mechanical rooms, and food or chemical processing gear. It is not the answer for chloride-heavy or aggressive chemical exposure. For coastal salt spray or pool chemical rooms, step up to 316 stainless instead.

No. The JSBH808 is flagged as not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing requirements you need a domestic-certified hex bolt instead.

This one lists 100,000 to 150,000 psi minimum tensile and 65,000 psi minimum yield, with hardness Rockwell B95 to C32. That's in the neighborhood of a Grade 5 plated bolt on tensile but lower on yield, so for high-preload structural connections a carbon steel Grade 5 or 8 is the stronger pick. Stainless is being chosen here for corrosion life, not maximum clamp load. Stainless also galls easily on tightening, so use anti-seize on the threads.

25 bolts per jar, and 25 each is the order minimum. The jar pack is aimed at truck stock and MRO cribs where loose bolts get lost in a bin.

No. The jar holds 25 hex bolts only, so order 5/8-11 stainless hex nuts and 5/8 flat and lock washers separately. Match them in 18-8 stainless so you don't set up dissimilar metal corrosion at the joint.

A 5/8 inch clearance hole works, but keep in mind the shank can measure up to 0.6250 inch and the bolt needs clearance, so a standard 11/16 inch clearance hole is the practical drill for a 5/8 bolt. A hole drilled exactly 5/8 inch will be a tight interference fit.

Metallics lists the field application as electrical, plumbing, heating and air conditioning work. Typical uses are anchoring rooftop unit curbs and equipment rails, strut and trapeze hangers for large conduit runs, transformer and switchgear pads, and pump or tank mounting where the fastener sees weather or washdown. The 6 inch length gives you room through a thick base plate plus shims.