You may also like
Bolts 1/4-20 X 2-1/2 Carriage Blt St (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Dimensional Standard:
- ASME B18.5-1990
- Fastener Head Type:
- Mushroom
- Fastener Head Width:
- 0.563 - 0.594 in.
- Fastener Height:
- 0.125 - 0.145
- Fastener Length:
- 2/1/02
- Fastener Width:
- 0.245 - 0.260
- Hardness:
- Rockwell B70-B100
- Language Code:
- EN
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Outside Diameter:
- 0.237 - 0.260 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 1329 g
- Product Width:
- 114.3 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 60000 psi minimum
- Thread Per Inch:
- 20
- Yield Strength:
- 36000 psi minimum
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- CB and JCB
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Bolt
- Product Material:
- Steel
Metallics JCB71 – Frequently Asked Questions
1) What size is the Metallics JCB71 carriage bolt and how many come in a jar?
The JCB71 is a 1/4-20 x 2-1/2 inch carriage bolt in zinc plated steel, packed 100 to a jar. Thread pitch is 20 threads per inch, so it mates with standard 1/4-20 nuts. Order minimum is 100 count, which is the single jar.
2) What hole diameter do I need to drill for a 1/4-20 carriage bolt like the JCB71?
Shank outside diameter on the JCB71 runs 0.237 to 0.260 inch, so a 17/64 inch hole clears it and a 1/4 inch hole is a tight press that lets the square shoulder under the head bite the wood. Measured across the flats the body is 0.245 to 0.260 inch.
3) Is this carriage bolt strong enough for structural blocking or strut hangers?
The JCB71 is a low carbon steel bolt rated 60,000 psi minimum tensile and 36,000 psi minimum yield, with hardness Rockwell B70-B100. That is the usual grade for wood framing, strut, and general electrical mounting work. If a drawing calls out a Grade 5 or Grade 8 bolt, this is not a substitute.
4) Does the Metallics JCB71 meet Buy American and ARRA requirements for a public job?
Yes, the JCB71 is flagged both ARRA compliant and Buy American compliant, which is what a government, school, or federally funded project submittal asks for. Country of origin is listed as multiple.
5) What standard does this carriage bolt conform to for a submittal package?
Dimensions conform to ASME B18.5-1990, the round head bolt standard, so head diameter, shoulder, and thread fall within published tolerances. That is the line to cite on a spec sheet when a GC asks what the fastener is built to.
6) Will the zinc plating on these bolts hold up outdoors or in a damp location?
The finish is zinc plating over steel, which handles indoor and dry or occasionally damp conditions. For sustained exterior exposure, a wet well, or treated lumber, zinc plating is not the right choice; move to hot dip galvanized or stainless.
7) Do these carriage bolts come with nuts and washers?
No. The jar holds 100 bolts only. Nuts and washers are ordered separately, and for a 1/4-20 carriage bolt you want 1/4-20 hex nuts plus 1/4 inch flat washers on the nut side.
8) I need a different length or a smaller quantity of this Metallics carriage bolt. What are my options?
Metallics builds the carriage bolt line as the CB and JCB series, and other sizes and quantities are available by request. The JCB prefix is the jar packed version; the CB designation covers the same bolt in other pack configurations.
How fast can I get the Metallics JCB71 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 JCB71 come with a warranty?
Absolutely. The Metallics JCB71 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 JCB71?
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 JCB71 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.