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Bolts 5/16-18 X 3/4 Hxbt SS (Jar 100)
Features
- The molybdenumcontent gives this type of stainless even greater corrosion resistance than 18-8 as well as superior strength at high temperatures.
- 18-8 and 316 stainless steel cap screws are both made from austenitic alloy
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Division:
- Electrical H1
- Fastener Head Height:
- 13/64 in.
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.489 - 0.500 in.
- Fastener Height:
- 0.195 - 0.211
- Fastener Length:
- 4-Mar
- Fastener Width:
- 0.557 - 0.577
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Hardness:
- Rockwell B95-C32
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Bolt_Dom_18-8_SS_316_SS.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- JR
- Outside Diameter:
- 0.3065 - 0.3125 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 3.6 in
- Product Length:
- 3 in
- Product Weight:
- 1148 g
- Product Width:
- 76.2 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 100000 - 150000 psi minimum
- Thread Per Inch:
- 18
- Yield Strength:
- 65000 psi minimum
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- SBHC and JSBHC
- Product Details:
- Hexagonal Bolt
- Product Material:
- 316 Stainless Steel
Metallics JSBH421 – Frequently Asked Questions
1) Is the Metallics JSBH421 hex bolt 316 stainless or 18-8 stainless?
The JSBH421 is 316 stainless steel. The molybdenum in 316 gives it better corrosion resistance than 18-8 and better strength at elevated temperature, which is why it gets specified for coastal, wash-down, and chemical-exposure work instead of standard 18-8.
2) What thread does a 5/16-18 hex bolt take, and will it thread into a standard 5/16 coarse nut?
It is 18 threads per inch, which is 5/16 UNC coarse thread, so it mates with any standard 5/16-18 coarse nut or tapped hole. Shank diameter runs 0.3065 to 0.3125 inch. For corrosion matching, pair it with 316 stainless nuts and washers rather than plated steel.
3) Is this stainless bolt strong enough for strut, hanger, and equipment mounting, or do I need a grade 5 bolt?
Tensile strength on these 316 stainless hex bolts is 100,000 to 150,000 psi minimum with 65,000 psi minimum yield, and hardness is Rockwell B95 to C32. That is adequate for electrical, plumbing, and HVAC mounting work (strut, hangers, brackets, enclosures). Where a drawing calls out a specific SAE grade or a structural bolt, stainless is not an interchangeable substitute, so follow the spec.
4) Does the Metallics JSBH421 meet Buy American or ARRA requirements on a federal job?
No. These bolts are not Buy American compliant and are not ARRA compliant, with country of origin listed as multiple. If your contract carries a domestic-sourcing clause, this jar will not satisfy it and you need a domestically produced hex bolt instead.
5) What wrench or socket size fits the head on this 5/16 stainless hex bolt?
Head width across flats measures 0.489 to 0.500 inch, so a 1/2 inch wrench or socket is the fit. Head height is 13/64 inch, which matters if you are working in a shallow channel or under a bracket with limited clearance.
6) How many bolts come in a jar of Metallics JSBH421, and can I buy fewer?
It ships as a jar of 100, and the jar is the minimum order unit, so 100 pieces is the smallest quantity. Metallics notes other sizes and quantities are available by request if 100 of this size is not what the job needs.
How fast can I get the Metallics JSBH421 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 JSBH421 come with a warranty?
Absolutely. The Metallics JSBH421 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 JSBH421?
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 JSBH421 from ZenSupply?
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and
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Our team is always ready to help you choose the right product for your project.