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Bolt 3/8-16 x 2-1/2 Carriage Blt BO (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 JCB25BLK – Frequently Asked Questions
1) What hole size do I drill for a 3/8 inch carriage bolt like the JCB25BLK?
A carriage bolt has a square shoulder under the domed head that bites into wood as the nut is tightened, so the hole is sized to the 3/8 inch shank, not to the shoulder. Drill 3/8 inch through wood and let the shoulder pull in; through steel or a bracket, go to a 7/16 inch clearance hole and the shoulder will not key, so hold the head with a wrench or a backing plate while you tighten.
2) Is the black oxide finish on the JCB25BLK bolt OK outdoors?
No. Black oxide is a conversion coating for appearance and mild corrosion resistance indoors, and it will rust in wet or exterior service. Use it for dry interior work such as strut, backboards, equipment mounting and wood framing inside the building. For exterior or damp locations, specify a hot dip galvanized or stainless 3/8-16 carriage bolt instead.
3) How many bolts come in a jar of Metallics JCB25BLK?
Fifty bolts per jar. Metallics packs these in a jar rather than a box, which is what you want on a truck or a cart where loose fasteners get lost.
4) Do I get nuts and washers with the Metallics JCB25BLK?
The JCB25BLK is sold as bolts only, 3/8-16 x 2-1/2, fifty to the jar. Order 3/8-16 hex nuts separately, and plan on a flat washer under the nut side since the carriage bolt head is designed to seat without one.
5) What is the Metallics part number for a 3/8-16 x 2-1/2 black carriage bolt?
JCB25BLK is the Metallics number, and the J prefix reflects the jar pack of 50.
How fast can I get the Metallics JCB25BLK 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 JCB25BLK come with a warranty?
Absolutely. The Metallics JCB25BLK 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 JCB25BLK?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics JCB25BLK from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.