Metallics JBBH64 Bolts 1/2-13 X 1-1/4 Hxbt Sbr (Jar 50)

Silicon bronze is the reason to pick this bolt. The JBBH64 is made of silicon bronze to ASTM F468, which is the standard for nonferrous bolts, so it resists corrosion in damp, coastal, and buried-box conditions where a plain steel or zinc-plated bolt would rust and lose contact. Metallics lists it for electrical, plumbing, heating and air conditioning work.

It's a 1/2-13 UNC thread, 13 threads per inch, cut to ANSI/ASME B1.1. That's the standard coarse series for a 1/2 inch fastener, so any standard 1/2-13 nut or tapped 1/2-13 hole will accept it. For corrosion matching, pair it with a silicon bronze nut rather than plated steel.

No. The JBBH64 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded job with domestic sourcing requirements, you'll need a domestically produced silicon bronze hex bolt instead.

The JBBH64 ships as a jar of 50 bolts, and 50 each is the order minimum, so it is sold by the jar rather than the piece. Metallics notes other sizes and quantities are available by request.

Silicon bronze, like the Metallics JBBH64, is the choice when you need the fastener to stay electrically conductive and galvanically compatible with copper and bronze grounding components. Stainless resists corrosion too, but it's a poorer conductor and bolting stainless directly to copper invites dissimilar-metal corrosion. Where the bolt is purely structural and not in a current path, a plated steel bolt in the same 1/2-13 thread is the cheaper route.

Finish is bronze, bare silicon bronze rather than a plated or painted coating. It is the natural metal color and will weather to a darker patina outdoors, so it blends with bronze lugs, straps, and ground clamps instead of standing out the way a bright zinc bolt does.

A full jar runs 5.31 lbs. The jar itself is listed at 5.75 inches high and 3.5 by 3.5 inches, so it sits on a shelf or in a van bin without repackaging.