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Bolts 3/8-16 X 3/4 Carriage Blt St-zn (Jar 100)
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:
- 4-Mar
- 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:
- 100
- Order Minimum Uom Imperial:
- JR
- Outside Diameter:
- 0.360 - 0.388 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 5.75 in
- Product Length:
- 3.5 in
- Product Weight:
- 1928 g
- Product Width:
- 88.9 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 JCB55 – Frequently Asked Questions
1) How thick a material can a 3/8-16 x 3/4 carriage bolt actually fasten?
At 3/4 inch overall length, the JCB55 is a short bolt. Subtract the square shoulder (0.188 to 0.208 inch deep under the head) and the thread you need for the nut, and you are realistically clamping thin stock, strut, sheet steel, or light angle. For 2x lumber or stacked members you need a longer carriage bolt in the same 3/8-16 thread.
2) Can I use these bolts on a Buy American or ARRA funded project?
No. The JCB55 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On a federally funded job with domestic sourcing requirements you will need a domestic carriage bolt instead.
3) Is a zinc plated steel carriage bolt OK for outdoor or damp locations?
The JCB55 is steel with a zinc finish, which is a general indoor and protected-location plating. For exterior exposure, wet mechanical rooms, or anywhere washdown or salt is involved, use stainless carriage bolts instead. Zinc will hold up fine in dry interior electrical, plumbing, and HVAC work.
4) How strong is the Metallics JCB55 carriage bolt?
Rated at 60,000 psi minimum tensile and 36,000 psi minimum yield, with hardness of Rockwell B70 to B100. That is low-carbon commercial grade strength, fine for general mounting and hanging work. If a drawing calls for a Grade 5 or Grade 8 bolt, this is not it.
5) Does the Metallics JCB55 meet a dimensional spec I can put on a submittal?
Dimensions conform to ASME B18.5-1990, the standard for round head bolts including carriage bolts. Head width runs 0.782 to 0.844 inch across, head height 0.188 to 0.208 inch. That gives you the bearing footprint if you are checking clearance against a slot or channel.
6) Why use a carriage bolt instead of a hex bolt for mounting electrical equipment?
The mushroom head sits nearly flush and has no flats to grip, so it resists being backed off from the head side and leaves a smooth low-profile surface, which matters where a cover, panel, or wire run passes over the bolt. The square shoulder locks into the hole so one wrench on the nut does the whole job. Use a hex bolt instead when you need to hold the head with a wrench or need higher strength. Metallics lists this bolt for electrical, plumbing, heating, and air conditioning work.
7) How does the JCB55 carriage bolt ship, and how many come in a pack?
It ships as a jar of 100 bolts, and 100 is the order minimum, so you are buying by the jar rather than the piece. Jar weight is 1,928 g. Other sizes and quantities can be requested.
How fast can I get the Metallics JCB55 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 JCB55 come with a warranty?
Absolutely. The Metallics JCB55 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 JCB55?
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 JCB55 from ZenSupply?
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and
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every order.
Our team is always ready to help you choose the right product for your project.