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Bolts 3/8-16 x 2 Carriage Blt Galv (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Division:
- Electrical H1
- Fastener Head Type:
- Mushroom
- Fastener Head Width:
- 0.782 - 0.844 in.
- Fastener Height:
- 0.188 - 0.208
- Fastener Length:
- 2
- Fastener Width:
- 0.368 - 0.388
- Hardness:
- Rockwell B70-B100
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Carriage_Bolt_St-Zn_and_Galv.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Outside Diameter:
- 0.360 - 0.388 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 3230 g
- Product Width:
- 114.3 MM
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 16
- Yield Strength:
- 36000 psi minimum
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- CB and JCB
- Product Finish:
- Galvanized
- Product Details:
- Hexagonal Bolt
- Product Material:
- Steel
Metallics JCB24G – Frequently Asked Questions
1) What size hole do I need to drill for the Metallics JCB24G carriage bolt?
The JCB24G is a 3/8-16 carriage bolt with a measured shank outside diameter of 0.360 to 0.388 inch, so a 3/8 inch hole is the match. The square shoulder under the head needs to bite into the wood or pull through a metal hole as the nut is tightened, so do not oversize past 3/8 inch or the bolt will spin instead of locking.
2) Can the Metallics JCB24G galvanized carriage bolt be used outdoors?
Yes. It is steel with a galvanized finish, which is the standard coating for exterior and damp-location fastening (fences, ground-level framing, outdoor equipment mounts). Pair it with galvanized nuts and washers rather than plain or zinc-plated ones so the coatings match and you do not set up a corrosion cell.
3) Do nuts and washers come with the JCB24G carriage bolts?
No. The JCB24G ships as bolts only, 100 to the jar. You order 3/8-16 nuts separately, and for softwood or sheet metal you will want a flat washer under the nut to spread the load. Thread pitch is 16 threads per inch, so any standard 3/8-16 coarse nut threads on.
4) How much surface does the carriage bolt head cover, and will it sit flush?
The mushroom head on the JCB24G runs 0.782 to 0.844 inch across and stands 0.188 to 0.208 inch proud of the surface. That domed, smooth head is the point of a carriage bolt: no socket or driver engagement on the finished side, nothing to catch on, and a wide bearing area so it does not sink into timber. It does not countersink flush.
5) Is a carriage bolt the right choice, or should I use a hex bolt or lag screw?
Use a carriage bolt like the JCB24G when you can get a nut on the back side and you want a smooth, tamper-resistant head on the exposed face. The square shoulder locks the bolt so you tighten from the nut side with one wrench. If you can only reach one side of the material, a lag screw is the better call. If you need to hold the fastener with a wrench on the head during assembly, go with a hex bolt instead.
6) What is the strength rating on the Metallics JCB24G carriage bolt?
Yield strength is 36,000 psi minimum, with hardness in the Rockwell B70 to B100 range. That is a low-carbon, general-purpose structural fastener, suitable for framing, strut, equipment mounts, and fence work. It is not a high-strength bolt, so if your drawing calls out a graded high-strength fastener, specify accordingly.
7) Is the Metallics JCB24G acceptable on a federally funded or Buy American job?
The JCB24G is flagged both ARRA compliant and Buy American compliant in the manufacturer's data. Country of origin is listed as multiple, so if your contract requires a specific origin certification on each lot, request the documentation for the lot you receive.
8) How many bolts come in a jar and can I buy fewer than 100?
The JCB24G is sold by the jar of 100 pieces, and 100 count is the order minimum. Metallics does make the CB and JCB carriage bolt series in other diameters, lengths, and pack quantities, so if 3/8-16 x 2 in a 100 jar is not the combination you need, ask and it can be sourced.
How fast can I get the Metallics JCB24G delivered?
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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 JCB24G come with a warranty?
Absolutely. The Metallics JCB24G 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 JCB24G?
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