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Bolts 1/2-13 x 3-1/4 HXBT Sbr (Jar 50)
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:
- 0.736 - 0.750 in.
- Fastener Height:
- 0.302 - 0.323
- Fastener Length:
- 3/1/04
- Language Code:
- EN
- Material Standard:
- ASTM F468
- Order Minimum Imperial:
- 50
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 10.21 lbs
- Product Width:
- 4.5 in
- Remarks:
- The catalog UPC differ from the tarnsaction daat spreadsheet UPC
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 13
- 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 JBBH31 – Frequently Asked Questions
1) What size and thread is the Metallics JBBH31 hex bolt?
The JBBH31 is a 1/2-13 x 3-1/4 hex bolt, so 1/2 inch diameter with 13 threads per inch, which is the standard UNC coarse pitch for that diameter. Threads are cut to ANSI/ASME B1.1 and the bolt dimensions follow ASME B18.2.1, so it mates with any standard 1/2-13 nut or tapped hole.
2) Why use a silicon bronze bolt instead of galvanized steel for a ground connection?
The JBBH31 is silicon bronze made to ASTM F468, which is the spec for nonferrous bolting. Bronze hardware is used on grounding and bonding work because it stays compatible with copper conductors and copper-clad ground rods instead of setting up the galvanic corrosion you get when steel or zinc contacts copper in wet soil. Finish is bronze, matching the base material rather than a plating that can wear off.
3) Does the Metallics JBBH31 bolt qualify for Buy American or ARRA funded jobs?
Metallics lists the JBBH31 as both ARRA compliant and Buy American compliant. Country of origin is China, so if your contract requires domestic melt and manufacture rather than the broader compliance flags, confirm which standard the specification is written to before you submit it.
4) What wrench or socket size fits the head of the Metallics JBBH31?
Head width across flats measures 0.736 to 0.750 inch, so a 3/4 inch wrench or socket is the right tool. Head height runs 0.302 to 0.323 inch. It is a plain hex head, no washer face flange or drive recess.
5) How many bolts come in a Metallics JBBH31 jar, and can I buy a smaller quantity?
JBBH31 ships as a jar of 50 bolts, and 50 count is the order minimum, so the jar is the smallest unit sold. Other sizes and quantities in the BBH and JBBH family can be arranged by request if 3-1/4 inch length or a 50-count jar does not suit the job.
6) What does a jar of 50 of these bolts weigh for shipping or carrying to the roof?
A full jar of 50 is listed at 10.21 lbs, which is one-hand carry weight for a service van or a lift to the roof.
7) Is the JBBH31 the same bolt as the Metallics BBH version?
Both sit in the Metallics BBH and JBBH series of silicon bronze hex bolts. The J prefix on JBBH31 denotes the jar pack, so the bolt itself is the same 1/2-13 x 3-1/4 silicon bronze hex bolt, with the difference being how it is packaged and the 50 count minimum.
How fast can I get the Metallics JBBH31 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 JBBH31 come with a warranty?
Absolutely. The Metallics JBBH31 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 JBBH31?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
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and
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