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Bolts 3/8-16 x 3/4 Carriage Blt SS (Jar 50)
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
- Division:
- Electrical H1
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.782 - 0.844 in.
- Fastener Height:
- 0.188 - 0.208
- Fastener Length:
- 4-Mar
- Fastener Width:
- 0.368 - 0.388
- Language Code:
- EN
- Material Standard:
- ASTM F593
- 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:
- CT
- Outside Diameter:
- 0.329 - 0.388 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 3.6 in
- Product Length:
- 3 in
- Product Weight:
- 939 g
- Product Width:
- 76.2 MM
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 16
- Thread Standard:
- ANSI/ASME B1.1
- Thread Type:
- UNC
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- CB and JCB
- Product Details:
- Hexagonal Bolt
- Product Material:
- 316 Stainless Steel
Metallics JCB55SS316 – Frequently Asked Questions
1) What size hole do I drill for the Metallics JCB55SS316 carriage bolt?
The bolt is a 3/8-16 UNC carriage bolt with a shank outside diameter measured at 0.329 to 0.388 inch, so a 3/8 inch clearance hole is what it is sized for. In wood, the square neck under the head (0.368 to 0.388 inch across, 0.188 to 0.208 inch deep) pulls into the hole and keeps the bolt from spinning while you tighten the nut, so don't oversize the hole or the neck won't bite.
2) Is 316 stainless worth it over 18-8 for outdoor or coastal electrical mounting?
These Metallics carriage bolts are 316 stainless steel made to ASTM F593, which is the grade to use where there's chloride exposure: coastal air, roof-mounted equipment, wash-down areas, water or wastewater plants. 18-8 (304) stainless handles general outdoor service but pits faster in salt. If the assembly is indoors and dry, 18-8 is usually enough; if salt or chemicals are in play, stay with the 316.
3) How thick a material will a 3/8 x 3/4 carriage bolt actually clamp?
Total length is 3/4 inch under the head, and part of that is taken up by the square neck (0.188 to 0.208 inch) plus the nut and any washer. Practically that leaves you fastening thin stock: strut, sheet metal brackets, plate-to-plate connections, light channel work. For a 2x or any stacked assembly you need a longer bolt in the same series.
4) Does the JCB55SS316 jar come with nuts and washers?
No. The jar is bolts only, 50 count, sold as a jar pack with a 50-piece minimum. Order 3/8-16 stainless hex nuts and, if you want to protect the mating surface, 3/8 flat washers separately. For 316 bolts, match the nuts and washers in stainless too, so you aren't setting up galvanic corrosion with plated steel hardware.
5) Do these stainless carriage bolts meet Buy American requirements for a federal job?
The JCB55SS316 is flagged compliant for both Buy American and ARRA. Country of origin is listed as multiple, so if your specification requires a single documented origin for each lot, request the documentation for the lot you're shipped.
6) Will the head of this carriage bolt sit flush, and how wide is it?
Carriage bolts have a domed, smooth head with no driver recess, so nothing protrudes to catch on and there's nothing to turn from the head side, which is why they get used where the head faces a public or traffic side. Head width on this one runs 0.782 to 0.844 inch, built to the ASME B18.5 dimensional standard. The head crowns above the surface rather than sitting flush.
7) Will a standard 3/8-16 nut thread onto the Metallics JCB55SS316?
Yes. Threads are UNC coarse at 16 threads per inch, cut to ANSI/ASME B1.1, so any standard 3/8-16 nut or tapped 3/8-16 hole takes it. It will not thread into a 3/8-24 fine-thread nut.
8) I need a different length in this same stainless carriage bolt. Can I get it?
Yes. The Metallics CB and JCB carriage bolt series covers other sizes and pack quantities by request, so if you need 3/8-16 in a longer length or a larger jar or bulk count, it can be sourced in the same 316 stainless to ASTM F593.
How fast can I get the Metallics JCB55SS316 delivered?
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Does the Metallics JCB55SS316 come with a warranty?
Absolutely. The Metallics JCB55SS316 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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