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Bolts 1/4-20 x 1/2 Carriage Blt SS (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
- Division:
- Electrical H1
- Fastener Head Type:
- Mushroom
- Fastener Head Width:
- 0.563 - 0.594 in.
- Fastener Height:
- 0.125 - 0.145
- Fastener Length:
- 2-Jan
- Fastener Width:
- 0.245 - 0.260
- Field Application:
- Electrical, Plumbing, Heating, Air Conditioning Industries
- 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:
- 100
- Order Minimum Uom Imperial:
- JR
- Outside Diameter:
- 0.213 - 0.260 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 2.7 in
- Product Length:
- 3 in
- Product Weight:
- 948 g
- Product Width:
- 76.2 MM
- Sub Division:
- Electrical-E H2
- Thread Direction:
- Right Hand
- Thread Per Inch:
- 20
- 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:
- 18-8 Stainless Steel
Metallics JCB42SS – Frequently Asked Questions
1) What nut and tapped hole does a 1/4-20 carriage bolt from the Metallics JCB series thread into?
Threads are 1/4-20 UNC, right hand, cut to ANSI/ASME B1.1. Any standard 1/4-20 nut, coupling nut, or 1/4-20 tapped strut or channel will take it. For stainless-on-stainless work pair it with an 18-8 stainless nut so you are not mixing dissimilar metals in the joint.
2) How thick a material can a 1/4-20 x 1/2 inch carriage bolt actually clamp?
At 1/2 inch of overall bolt length, the usable grip is short. Once you allow for a washer and a nut you are fastening thin stock, sheet metal, straps, or clamping into a tapped hole rather than bolting through dimensional lumber or doubled steel. If you need to pass through 1/2 inch or more of material plus a nut, step up to a longer carriage bolt in the same CB and JCB series.
3) Are these carriage bolts corrosion resistant enough for outdoor or wet locations?
They are 18-8 stainless steel made to ASTM F593, so they hold up in damp and outdoor service far better than zinc-plated carbon steel, which is why they get specified for rooftop equipment, mechanical rooms, and exterior strut runs. 18-8 is the general-purpose austenitic grade; for chloride-heavy coastal or pool chemical exposure, 316 stainless is the grade to ask for instead.
4) Do these Metallics stainless carriage bolts meet Buy American or ARRA requirements on a federal job?
No. The JCB42SS carriage bolts are not Buy American compliant and are not ARRA compliant, with country of origin listed as multiple. If your project carries a domestic sourcing clause, these will not satisfy it and you need a domestically produced fastener instead.
5) Will the mushroom head of this stainless carriage bolt sit flush, or does it stand proud?
It stands proud. The head is a mushroom (round dome) type measuring 0.563 to 0.594 inch across and 0.125 to 0.145 inch high, so it sits on the surface rather than countersinking. Under the dome is the square neck that bites the material to stop the bolt spinning while you tighten the nut from the back. If you need a flush finish, a carriage bolt is the wrong head style.
6) How are these 1/4-20 stainless carriage bolts packaged and what is the minimum order?
They come in a jar of 100 pieces, and that jar is the minimum order quantity. Total jar weight is 948 g. The jar format is aimed at truck stock and shop bins rather than loose counter sales. Other sizes and quantities in the CB and JCB carriage bolt line can be had by request.
7) Is this carriage bolt dimensionally standard, or is it a proprietary Metallics head?
Dimensions follow ASME B18.5, the standard for round head square neck bolts, and threads follow ANSI/ASME B1.1. That means the head diameter, neck, and thread will interchange with any other conforming 1/4-20 x 1/2 carriage bolt, so you can mix brands across a job without the heads looking different or the nuts not fitting.
8) What trades actually use these stainless carriage bolts?
The JCB42SS is catalogued for the electrical, plumbing, heating, and air conditioning trades. Typical use is mounting straps, brackets, clamps, and light equipment where the square neck lets one person tighten from the nut side without holding a wrench on the head, and where stainless is wanted for corrosion resistance.
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Does the Metallics JCB42SS come with a warranty?
Absolutely. The Metallics JCB42SS is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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