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Bolts 5/16-18 x 1-3/4 HXBT Sbr (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Dimensional Standard:
- ASME B18.2.1
- Division:
- Electrical H1
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.489 - 0.500 in.
- Fastener Height:
- 0.195 - 0.211
- Fastener Length:
- 1/3/04
- Language Code:
- EN
- Material Standard:
- ASTM F468
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 4.96 lbs
- Product Width:
- 4.5 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 18
- Thread Standard:
- ANSI/ASME B1.1
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- BBH and JBBH
- Product Finish:
- Bronze
- Product Details:
- Hexagonal Bolt
- Product Material:
- Silicon Bronze
Metallics JBBH55 – Frequently Asked Questions
1) What size and thread is the Metallics JBBH55 hex bolt?
The JBBH55 is a 5/16-18 x 1-3/4 inch hex bolt, so 5/16 inch diameter with 18 threads per inch on a coarse UNC thread cut to ANSI/ASME B1.1. Threads mate with any standard 5/16-18 nut or tapped hole.
2) Why use a silicon bronze bolt instead of galvanized or stainless steel for a ground connection?
The JBBH55 is silicon bronze to ASTM F468, which is the material electricians use where the bolt lands on copper, bronze, or brass, as in grounding and bonding connections and marine work. Bronze against copper avoids the galvanic mismatch you get with zinc-plated steel, and it keeps a low-resistance joint over time. If the mating hardware is steel and corrosion is not a concern, a plain or galvanized steel hex bolt is the cheaper choice.
3) Will the JBBH55 hex head fit a standard 1/2 inch wrench or socket?
Yes. The head measures 0.489 to 0.500 inch across the flats, so a 1/2 inch wrench or socket is the correct size. Head height runs 0.195 to 0.211 inch. The head is dimensioned to ASME B18.2.1, the standard for square and hex bolts, so it also clears standard hex-head washer and clamp recesses.
4) How many bolts come in a jar of Metallics JBBH55, and can I buy fewer?
The JBBH55 ships as a jar of 100 bolts, and 100 count is the order minimum, so it is sold by the full jar rather than loose piece counts. Metallics offers other sizes and quantities in the BBH and JBBH series by request.
5) Does the Metallics JBBH55 bolt meet Buy American and ARRA requirements on a federal job?
Metallics lists the JBBH55 as both Buy American compliant and ARRA compliant. Country of origin is China. On federally funded work, give both of those to your specifier, since the compliance basis and the origin both get reviewed.
6) What grip length does a 1-3/4 inch silicon bronze hex bolt give me?
At 1-3/4 inches of bolt length under the head, the JBBH55 suits stack-ups of roughly an inch to an inch and a quarter once you allow for a nut and washers. For bonding a lug and jumper to a bronze pipe clamp or a ground plate that is thicker than that, step up to a longer length in the same BBH and JBBH silicon bronze series.
7) What color are Metallics silicon bronze bolts, and will they match existing bronze grounding hardware?
Finish is bronze, the natural color of the silicon bronze material rather than a plating, so the JBBH55 reads as the same warm bronze tone as copper and bronze ground clamps, lugs, and bus hardware. Because the color is the base metal, it will not chip or flake off at the wrench flats the way a plated finish can.
8) How much does a jar of 100 Metallics JBBH55 bolts weigh and how big is the jar?
A jar of the JBBH55 weighs 4.96 lbs and measures 7.25 by 4.5 by 4.5 inches, which matters if you are stocking a truck bin or a shelf in an MRO crib.
How fast can I get the Metallics JBBH55 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics JBBH55 come with a warranty?
Absolutely. The Metallics JBBH55 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics JBBH55?
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