Metallics JBBH23 Bolts 3/8-16 X 1-1/2 Hxbt Sbr (Jar 100)

Solid silicon bronze all the way through, not a plated finish. The material is specified to ASTM F468, the standard covering nonferrous bolts and studs for general use, and the finish is bronze. That is why it gets used outdoors, in damp vaults, and in marine or corrosive settings where a plated steel bolt would rust out at the threads.

It is a 3/8-16 bolt, 16 threads per inch, cut to ANSI/ASME B1.1. That is standard 3/8 inch UNC, so any off-the-shelf 3/8-16 nut or tapped 3/8-16 hole will thread onto it. For full corrosion compatibility, pair it with silicon bronze nuts and washers rather than steel, since mixing metals in a wet location is what starts galvanic corrosion.

No. The JBBH23 is listed as not Buy American compliant and not ARRA compliant, with country of origin given as multiple. If your contract carries a domestic sourcing clause, this jar will not satisfy it and you need a domestically produced silicon bronze hex bolt instead.

Yes. The hex head measures 0.551 to 0.562 inches across the flats, which is the 9/16 inch wrench size, and head height runs 0.226 to 0.243 inches. The bolt is dimensioned to ASME B18.2.1, so it drives with ordinary 9/16 sockets and open-end wrenches and seats like any other inch-series hex bolt.

With 1-1/2 inches of overall bolt length, you lose roughly a half inch to the nut and washers, so plan on clamping up to about an inch of combined material. That covers typical grounding and bonding work, strap-to-lug stacks, and pipe clamp assemblies. For thicker buildups, step up to a longer length in the same BBH/JBBH silicon bronze hex bolt series.

These ship in a jar of 100 bolts, and one jar is the order minimum. Metallics notes that other sizes and quantities in the same silicon bronze hex bolt line are available by request, so if you need a different length or a bulk count rather than jars, ask for it rather than buying multiple jars.

Silicon bronze is the choice when the fastener contacts copper or bronze parts or sits in a wet, buried, or coastal location. Hot-dip galvanized steel will work for dry structural use, but in contact with copper grounding components the zinc and steel sacrifice themselves and the joint loosens and corrodes. The JBBH23 is solid silicon bronze to ASTM F468, so it stays electrically and mechanically compatible with copper bonding hardware for the life of the installation.

Metallics lists the field application as electrical, plumbing, heating and air conditioning. In practice that means grounding and bonding hardware, water pipe and ground clamp assemblies, outdoor equipment pads, and any wet or buried connection where the fastener has to survive as long as the conductor does.

The packaged jar weighs 5.96 lbs. Jar dimensions are given as 5.75 in by 3.5 in by 3.5 in, which matters if you are stocking a service van shelf or a parts bin rather than a shelf in the warehouse.