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Bolts 1/4-20 x 3-1/2 Carriage Blt St (Jar 100)
Manufacturer Resources
Product Specs
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Department:
- Electrical
- Product Subgroup:
- Bolts
Metallics JCB7 – Frequently Asked Questions
1) What size are the Metallics JCB7 carriage bolts and how many come in a jar?
The Metallics JCB7 is a 1/4-20 x 3-1/2 inch steel carriage bolt, packed 100 to a jar. The 1/4-20 callout means a 1/4 inch diameter shank with 20 threads per inch, so standard 1/4-20 nuts and washers thread onto it.
2) Do the JCB7 carriage bolts come with nuts and washers?
No. The JCB7 jar contains 100 carriage bolts only. You order 1/4-20 nuts and any flat or lock washers separately.
3) Why use a carriage bolt instead of a hex bolt or lag screw for mounting electrical equipment?
A carriage bolt has a smooth domed head with a square shoulder under it. Driving it into a round hole in wood, the shoulder bites and keeps the bolt from spinning, so you tighten from the nut side alone. The domed head also leaves nothing to snag or catch. A hex bolt needs a wrench on both ends; a lag screw threads into the wood itself and does not clamp through with a nut. The JCB7 is the through-bolt option, 1/4-20 x 3-1/2 inch steel.
4) Are Metallics JCB7 bolts suitable for outdoor or wet locations?
The JCB7 is a plain steel carriage bolt, not a stainless or hot-dip galvanized one. Keep it to dry interior work. For exterior mounting, damp vaults, or anywhere subject to washdown, specify a galvanized or stainless 1/4-20 carriage bolt instead.
5) What size hole do I drill for a 1/4-20 carriage bolt?
Drill 1/4 inch for the JCB7. The square shoulder is sized to be drawn into that same hole in wood as the nut is tightened, which is what locks the bolt against turning. Oversizing the hole defeats that and the bolt will spin.
6) Is a jar of 100 carriage bolts practical for a service truck or MRO crib?
That's the point of the pack. The JCB7 ships as a 100 count jar rather than loose bulk, so one SKU covers a common 1/4-20 x 3-1/2 inch size on the truck or on the shelf without rebagging.
How fast can I get the Metallics JCB7 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 JCB7 come with a warranty?
Absolutely. The Metallics JCB7 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 JCB7?
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installation tips, and troubleshooting. Contact Us
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