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Nuts 1/2-20 G8 Hx Nut St-zn (Jar 50)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Dimensional Standard:
- ANSI/ASME B182.2
- Division:
- Electrical H1
- Fastener Head Height:
- 16-Jul in.
- Fastener Head Width:
- 0.736 - 0.750 in.
- Fastener Height:
- 0.427 - 0.448
- Fastener Width:
- 0.840 - 0.866
- Grade:
- 8
- Hardness:
- Rockwell C24-32
- Language Code:
- EN
- Material Standard:
- AISI 1021 - 1045
- Order Minimum Imperial:
- 50
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 3.6 in
- Product Length:
- 3 in
- Product Weight:
- 1.8 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 20
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Hexagonal Nut
- Type2:
- Hexagonal Nut
- Series:
- JG8N
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Nut
- Product Material:
- Hardened Steel
Metallics JG8N1661 – Frequently Asked Questions
1) What thread does the Metallics JG8N1661 hex nut take?
It's a 1/2-20 nut, meaning a 1/2 inch nominal diameter at 20 threads per inch. That's the UNF (fine) thread pitch, not the more common 1/2-13 coarse UNC. A 1/2-13 bolt will not thread into it, so check the bolt's pitch before you order a jar.
2) Is a Grade 8 nut strong enough to pair with my Grade 8 bolts?
Yes. The JG8N1661 is a Grade 8 hex nut in hardened steel, tested at Rockwell C24-32, so it matches the strength class of a Grade 8 fastener assembly. Pairing a lower grade nut with a Grade 8 bolt is what strips threads under load, so for structural or high-torque joints this is the nut you want.
3) What wrench or socket size fits this 1/2-20 Grade 8 nut?
Across the flats it measures 0.736 to 0.750 inch, which is a 3/4 inch wrench or socket. Across the corners it runs 0.840 to 0.866 inch, so allow that clearance in a tight pocket or counterbore.
4) How thick is the nut, for figuring out how much bolt thread I need to leave?
Nut height runs 0.427 to 0.448 inch. Add a couple of thread pitches past that for full engagement when you're cutting rod or picking bolt length.
5) Does the zinc finish on these hex nuts hold up outdoors?
The finish is zinc plating on hardened steel. That's a standard indoor and protected-location coating, fine for dry interior electrical and mechanical work, panel and strut assembly, equipment mounting. For direct weather exposure, wet locations, or coastal air, zinc plate will eventually rust and a hot dip galvanized or stainless nut is the better call.
6) Do these nuts meet a recognized dimensional standard for spec work?
Dimensions conform to ANSI/ASME B182.2, and the steel is AISI 1021 to 1045. If a drawing or submittal calls out a B18.2.2 hex nut in Grade 8, those are the two lines a reviewer will look for.
7) Can I use these on a federally funded or Buy American job?
The JG8N1661 is flagged compliant for both ARRA and Buy American provisions. Country of origin on record is China, so if your contract requires domestic melt and manufacture rather than the Buy American provision as flagged here, confirm the specific clause your project is written to.
How fast can I get the Metallics JG8N1661 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 JG8N1661 come with a warranty?
Absolutely. The Metallics JG8N1661 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 JG8N1661?
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 JG8N1661 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
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every order.
Our team is always ready to help you choose the right product for your project.