Metallics JBBH25 Bolts 3/8-16 X 2-1/2 Hxbt Sbr (Jar 100)

Silicon bronze is the reason to pick the Metallics JBBH25 over a plain steel hex bolt. The bolt is solid silicon bronze with a bronze finish, made to ASTM F468 (the standard covering nonferrous bolts for general use), so it resists corrosion in damp, coastal, and chemically aggressive spots where zinc plating gives up. Metallics lists it for electrical, plumbing, heating and air conditioning work, which is where grounding and wet-location bonding hardware usually lands.

No. The JBBH25 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. On a job with domestic-content language in the spec, this part will not satisfy it, so you need a domestically produced silicon bronze bolt instead.

One hundred bolts to a jar, and the jar is the order minimum, so the smallest quantity you can buy is 100 pieces. Packed weight for the jar is 8.73 lbs. Metallics notes other sizes and quantities in the BBH and JBBH series are available by request if 2-1/2 inches is not the length you need.

Silicon bronze is the usual choice where the connection is to copper or bronze hardware, because it is electrically conductive and close to copper galvanically, so you avoid setting up a dissimilar-metal cell at the lug. The JBBH25 gives you that in a 3/8-16 x 2-1/2 hex bolt. Stainless is the pick when you need higher strength or are bolting to stainless or steel members; it is a poorer conductor and will drive corrosion on copper in a wet location. For bonding jumpers, water pipe clamps, and ground bars, go bronze.