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Nuts 5/16-18 G5 Hx Nut 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:
- ANSI/ASME B182.2
- Division:
- Electrical H1
- Fastener Head Height:
- 17/64 in.
- Fastener Head Width:
- 0.489 - 0.500 in.
- Fastener Height:
- 0.258 - 0.273
- Fastener Width:
- 0.557 - 0.577
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Grade:
- 5
- Hardness:
- Rockwell C32
- Language Code:
- EN
- Material Standard:
- AISI 1008 - 1026
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Gr_5_and_8_Hardened_Steel_Hex_Nut.pdf
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- JR
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 2.15 in
- Product Length:
- 3 in
- Product Weight:
- 1.1 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 18
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Hexagonal Nut
- Type2:
- Hexagonal Nut
- Series:
- JG5N
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Nut
- Product Material:
- Hardened Steel
Metallics JG5N164 – Frequently Asked Questions
1) What thread size and pitch does the Metallics JG5N164 hex nut use?
It's a 5/16 inch nut with 18 threads per inch, so it mates with 5/16-18 UNC bolts, rod, and studs. That's the standard coarse pitch for 5/16 fasteners, so it will run onto common coarse threaded rod and hex bolts of that diameter. It will not thread onto 5/16-24 fine thread hardware.
2) Is a Grade 5 nut strong enough to pair with Grade 5 bolts on strut and equipment mounting?
Yes. The JG5N164 is a Grade 5 hardened steel nut at Rockwell C32, which is the matching grade for Grade 5 bolts and threaded rod. Pairing a Grade 5 nut with a Grade 5 bolt means the bolt, not the nut, governs the joint. A lower grade (Grade 2) nut on a Grade 5 bolt is where people strip threads.
3) Are Metallics JG5N164 hex nuts Buy American or ARRA compliant for a government job?
No. These nuts are not Buy American compliant and are not ARRA compliant, and country of origin is listed as multiple. If your contract carries a domestic sourcing requirement, this is not the fastener to submit.
4) What size wrench or socket fits a 5/16-18 Grade 5 hex nut?
Across the flats the nut measures 0.489 to 0.500 inch, which is a 1/2 inch wrench or socket. Corner to corner (across points) it runs 0.557 to 0.577 inch, which matters if you're working in a tight box or channel and need clearance for the nut to turn.
5) Can zinc plated steel hex nuts be used outdoors or in damp mechanical rooms?
The zinc plating on these hardened steel nuts gives basic corrosion resistance, which is fine for indoor electrical and mechanical work, dry hangers, panel and equipment mounting, and sheltered locations. For sustained wet exposure, coastal air, or direct weather, step up to hot dip galvanized or stainless; zinc plate is a thin sacrificial coating, not a marine finish.
6) How many nuts come in a jar, and what is the minimum order?
The JG5N164 ships as a jar of 100 nuts, and the jar is the order minimum, so one jar is the smallest buy. Total shipping weight for the jar is 1.1 lbs. Other sizes and quantities can be had by request.
7) Does this hex nut meet a dimensional spec I can put on a submittal?
Dimensions conform to ANSI/ASME B182.2, and the steel is in the AISI 1008-1026 range. That gives you a citable dimensional and material standard for a submittal or a spec sheet on electrical, plumbing, and HVAC work, which is the field application Metallics lists for the JG5N series.
8) Is this a plain finished hex nut or a locking nut?
It's a plain Grade 5 hex nut, zinc plated hardened steel, with no nylon insert and no prevailing torque feature. On vibrating equipment, fan and compressor mounts, or anything you don't want backing off, add a lock washer, use a thread locker, or specify a nylon insert lock nut in 5/16-18 instead.
How fast can I get the Metallics JG5N164 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 JG5N164 come with a warranty?
Absolutely. The Metallics JG5N164 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 JG5N164?
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