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Bolts 3/8-16 x 6 Carriage Blt St-zn (Jar 50)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Dimensional Standard:
- ASME B18.5-1990
- Division:
- Electrical H1
- Fastener Head Type:
- Mushroom
- Fastener Head Width:
- 0.782 - 0.844 in.
- Fastener Height:
- 0.188 - 0.208
- Fastener Length:
- 6
- Fastener Width:
- 0.368 - 0.388
- Field Application:
- Electrical, Plumbing, Heating, Air Conditioning Industries
- Hardness:
- Rockwell B70-B100
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Carriage_Bolt_18-8_SS_and_316_SS.pdf
- Order Minimum Imperial:
- 50
- Order Minimum Uom Imperial:
- EA
- 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:
- 3819 g
- Product Width:
- 114.3 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 60000 psi minimum
- Thread Direction:
- Right Hand
- 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:
- Zinc
- Product Details:
- Hexagonal Bolt
- Product Material:
- Steel
Metallics JCB40 – Frequently Asked Questions
1) What size and thread is the Metallics JCB40 carriage bolt?
The JCB40 is a 3/8-16 x 6 inch carriage bolt: 3/8 inch diameter body, 16 threads per inch, right hand thread, 6 inch overall length. Measured shank outside diameter runs 0.360 to 0.388 inch, so it drops through a standard 3/8 inch drilled hole. Pair it with 3/8-16 nuts and washers.
2) How strong is the Metallics JCB40 carriage bolt, and is it a graded fastener?
Strength on the JCB40 is 60,000 psi minimum tensile and 36,000 psi minimum yield, with a hardness of Rockwell B70 to B100. Those are low-carbon steel values, which is normal for a zinc plated carriage bolt. If your drawing calls out a higher grade for a structural connection, this is not that bolt.
3) Can I use zinc plated carriage bolts outdoors or in a wet location?
The JCB40 is steel with a zinc finish. Zinc plating is a mild corrosion coating meant for dry or sheltered interior work, not sustained weather, washdown, or coastal exposure. For a roof curb, exterior rack, or anything that stays wet, specify a hot dip galvanized or stainless carriage bolt in the same 3/8-16 x 6 size instead.
4) Will the Metallics JCB40 meet a Buy American or ARRA requirement on a federal job?
No. The JCB40 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing language, you will need a domestically produced carriage bolt instead.
5) Is a carriage bolt the right choice, or should I use a hex bolt for through-bolting strut and wood?
Carriage bolts like the JCB40 have a mushroom (round) head with a square shoulder under it. The shoulder bites into wood or a square hole so the bolt will not spin while you tighten the nut from one side, and the domed head sits nearly flush with nothing to snag. That is what you want for through-bolting timber, blocking, or sheet where you can only get a wrench on the nut side. If both sides are steel and you need to hold a wrench on the head, a hex head bolt is the better pick. Head width on the JCB40 runs 0.782 to 0.844 inch with a head height of 0.188 to 0.208 inch.
6) How many bolts come in a jar of Metallics JCB40, and can I buy just a few?
JCB40 ships as a jar of 50 pieces, and 50 each is the order minimum, so it sells by the jar rather than loose count. Other sizes and quantities are available by request.
7) What kind of work are Metallics JCB carriage bolts stocked for?
These are MRO and trade fasteners for electrical, plumbing, heating, and air conditioning work: hanging and anchoring equipment supports, strut, backer boards, and brackets. The 6 inch length handles thick stacks such as blocking plus a mounting plate.
How fast can I get the Metallics JCB40 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 JCB40 come with a warranty?
Absolutely. The Metallics JCB40 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 JCB40?
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 JCB40 from ZenSupply?
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and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.