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Bolts 5/16-18 x 2-1/2 HXBT Sbr (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- 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:
- 2/1/02
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Language Code:
- EN
- Material Standard:
- ASTM F468
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- JR
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 5.75 in
- Product Length:
- 3.5 in
- Product Weight:
- 6.14 lbs
- Product Width:
- 3.5 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 JBBH15 – Frequently Asked Questions
1) Are the Metallics JBBH15 hex bolts actually silicon bronze, or just bronze plated?
Solid silicon bronze, not a plating. The JBBH15 bolt is made to ASTM F468, the standard covering nonferrous bolts and studs, with a bronze finish throughout. That matters on jobs where you need corrosion resistance and non-magnetic, non-sparking hardware rather than a coated steel bolt that rusts once the plating is scratched.
2) What thread does the Metallics JBBH15 bolt have, and will a standard 5/16 nut fit it?
It's a 5/16-18 bolt, 18 threads per inch, cut to ANSI/ASME B1.1. That's the standard 5/16 coarse (UNC) thread, so any off-the-shelf 5/16-18 nut or tapped 5/16-18 hole will take it. For full galvanic compatibility, pair it with silicon bronze nuts and washers rather than plain steel.
3) Why would an electrical contractor use a silicon bronze hex bolt instead of a plain galvanized one?
Silicon bronze is the usual pick for grounding and bonding connections and for damp or corrosive locations, because it resists corrosion and avoids the galvanic reaction you get between steel hardware and copper conductors or bronze clamps. Metallics calls out the JBBH15 for the electrical, plumbing, heating and air conditioning trades. On dry interior structural work, a standard plated steel bolt is the cheaper and stronger choice.
4) Does the Metallics JBBH15 bolt meet Buy American or ARRA requirements?
No. The JBBH15 hex bolt is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your project carries a domestic sourcing clause, this is not the bolt that will pass the submittal.
5) What wrench or socket size do I need for the Metallics JBBH15 hex bolt head?
The head measures 0.489 to 0.500 inch across the flats, so a 1/2 inch wrench or socket is the one you want. Head height runs 0.195 to 0.211 inch. Dimensions follow ASME B18.2.1, the hex bolt dimensional standard, so it drives like any standard 5/16 hex bolt.
6) How many bolts come in a jar of Metallics JBBH15, and can I buy fewer?
JBBH15 ships as a jar of 100 bolts, and the jar is the order minimum, so 100 pieces is the smallest quantity. Jar weight is 6.14 lbs. Other sizes and quantities are available by request.
7) How long is the Metallics JBBH15 bolt and how thick a material will it go through?
The JBBH15 is a 5/16-18 x 2-1/2 inch hex bolt, measured from under the head. Allow for the nut and washers, so figure roughly 2 inches of usable grip through your assembly on a through-bolted connection.
8) Is the JBBH15 the same thing as the Metallics BBH series bolt?
They are the same bolt in different packaging. The series is designated BBH and JBBH; the J prefix is the jar pack, so JBBH15 is the 5/16-18 x 2-1/2 silicon bronze hex bolt supplied as a jar of 100 rather than bulk. Spec, thread and material are identical.
How fast can I get the Metallics JBBH15 delivered?
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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 JBBH15 come with a warranty?
Absolutely. The Metallics JBBH15 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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