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Bolt 5/16-18 x 3 Fully Threaded Squ (Jar 50)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Bolts
Metallics JBSQ16 – Frequently Asked Questions
1) What thread size and length is the Metallics JBSQ16 square head bolt?
The JBSQ16 is a 5/16-18 x 3 inch square head bolt, fully threaded end to end. The 5/16-18 designation means a 5/16 inch nominal diameter with 18 threads per inch, which is the standard UNC coarse thread for that diameter, so it mates with any standard 5/16-18 nut or tapped hole.
2) Will the Metallics JBSQ16 work with standard 5/16 inch nuts and washers already in my stock?
Yes. At 5/16-18, the bolt takes any standard 5/16-18 coarse nut, including channel nuts, flange nuts and lock nuts, and any 5/16 inch flat or lock washer. Nuts and washers are not part of the jar of 50, so order those separately if your bin is short.
3) How many bolts come in a jar of Metallics JBSQ16?
Fifty bolts per jar. The JBSQ16 ships as a jar pack of 50 of the 5/16-18 x 3 inch square head bolts, which is the quantity to plan around if you are ordering for a service truck or a shop bin rather than a single fix.
4) Does a fully threaded bolt matter for strut channel and electrical mounting?
It does. Because the JBSQ16 is threaded the full 3 inches, you can set the nut at any depth, which is what you want when clamping varying stack-ups: channel plus a fitting plus a hanger, or a thick backing block. A partially threaded bolt of the same length forces the grip to land on the shank. The tradeoff is that full threading gives no smooth shoulder, so it is not the choice where a bolt is acting as a pivot or shear pin.
5) What is the difference between a square head bolt like the JBSQ16 and a hex head bolt?
Same thread, different head. The JBSQ16 has a square head, which is what strut channel and many electrical mounting fittings are cut for: the four flats seat against the inside lips of the channel so the bolt cannot spin while you run the nut down from the other side. A hex head is the general-purpose choice and takes a standard wrench, but it will turn in a channel slot where a square head locks.
6) What part number do I order for the Metallics 5/16-18 x 3 square head bolt?
Order Metallics JBSQ16. That is the manufacturer part number for the 5/16-18 x 3 inch fully threaded square head bolt supplied in a jar of 50, and it is the single model offered under that designation.
How fast can I get the Metallics JBSQ16 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 JBSQ16 come with a warranty?
Absolutely. The Metallics JBSQ16 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 JBSQ16?
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