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Bolt 3/8-16 x 1-1/2 Carriage Blt BO (Jar 100)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Bolts
Metallics JCB23BLK – Frequently Asked Questions
1) What size carriage bolt is the Metallics JCB23BLK?
The Metallics JCB23BLK is a 3/8-16 x 1-1/2 inch carriage bolt. That's a 3/8 inch diameter shank with 16 threads per inch (UNC coarse) and a 1-1/2 inch length measured from under the round head to the end of the thread.
2) Does the JCB23BLK carriage bolt come with nuts and washers?
No. The JCB23BLK is bolts only, 100 to the jar. Carriage bolts need a nut, and most installs want a flat washer under it to keep the nut from pulling into the material, so order those separately in matching 3/8-16 thread.
3) How many bolts come in a jar of Metallics JCB23BLK?
100 bolts per jar. The JCB23BLK ships in Metallics' jar pack, so you're buying the full 100-count container rather than loose pieces.
4) What does the BO finish mean on the Metallics JCB23BLK bolt?
BO is black oxide. It's a dark conversion coating that cuts glare and gives mild corrosion resistance, which is why these show up on indoor electrical support work, strut, and mounting brackets. Black oxide is not a weatherproofing finish, so for exposed outdoor or damp locations use a hot-dip galvanized or stainless carriage bolt instead.
5) Why use a carriage bolt instead of a hex bolt for electrical mounting work?
A carriage bolt has a smooth domed head with a square shoulder under it. Driven into a slightly undersized hole in wood or a square hole in metal, that shoulder locks the bolt so it can't spin, letting you tighten the nut from one side without a second wrench. The rounded head also leaves no sharp corner or wrench flats exposed, which matters where cable or hands pass by. A hex bolt is the better pick when you need to grip the head, such as through steel with round holes.
6) What hole size do I drill for a 3/8 carriage bolt?
A 3/8 inch diameter bolt like the JCB23BLK wants a 3/8 inch hole in wood so the square shoulder bites as you drive it, or a 7/16 inch hole in metal for clearance. If you oversize the wood hole, the shoulder won't grab and the bolt will spin when you torque the nut.
7) Is the Metallics JCB23BLK the right bolt for securing panels and equipment racks?
It works where the head side faces out and you don't need to grip the head. The 3/8-16 x 1-1/2 black oxide carriage bolt is sized for light to medium equipment and bracket mounting, and the domed head sits flush-ish against the surface. For rack rails and enclosures with round clearance holes only, a hex or socket cap screw in the same 3/8-16 thread holds better because you can hold the head while tightening.
How fast can I get the Metallics JCB23BLK 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 JCB23BLK come with a warranty?
Absolutely. The Metallics JCB23BLK 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 JCB23BLK?
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 JCB23BLK from ZenSupply?
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