Metallics JBBH71 Bolts 5/8-11 x 2-1/2 HXBT Sbr (Jar 100)

It's a 5/8-11 x 2-1/2 inch hex head bolt, so 5/8 inch diameter with 11 threads per inch (coarse UNC) and a 2-1/2 inch length. Threads are cut to ANSI/ASME B1.1, so they mate with any standard 5/8-11 nut or tapped hole.

Silicon bronze is the usual pick where you need corrosion resistance plus electrical conductivity, which is why these are stocked for the electrical, plumbing, and HVAC trades. Typical uses are grounding and bonding connections, marine or wet environments, and anywhere galvanic compatibility with bronze or copper hardware matters. The material is made to ASTM F468, the spec covering nonferrous bolts for general use.

No. The JBBH71 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your project has domestic sourcing requirements written into the contract, these bolts won't satisfy them.

They ship as a jar of 100 bolts, and the jar is the minimum order unit, so 100 pieces is the smallest quantity. Loose counts aren't broken out of the jar. Metallics does offer other sizes and quantities in the BBH and JBBH series by request if a 100-count jar of this size isn't what you need.

No. The jar contains 100 hex head bolts only. You'll need to order matching 5/8-11 nuts and 5/8 washers separately, and for a bronze installation you'd normally match the material, silicon bronze nuts and washers, rather than mixing in steel and setting up a galvanic pair.

The finish is bronze, which is the natural color of the silicon bronze base metal rather than a plating or coating. There's nothing to chip or wear off, but like any bare bronze it will darken and patina with outdoor exposure. If a consistent appearance matters on exposed work, plan on that color change.