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Nuts 1/2-13 G8 Hx Nut St-zn (Jar 50)
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:
- 16-Jul in.
- Fastener Head Width:
- 0.736 - 0.750 in.
- Fastener Height:
- 0.427 - 0.448
- Fastener Width:
- 0.840 - 0.866
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Grade:
- 8
- Hardness:
- Rockwell C24-32
- Language Code:
- EN
- Material Standard:
- AISI 1021 - 1045
- 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:
- 50
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 2.7 in
- Product Length:
- 3 in
- Product Weight:
- 1.85 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 13
- 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 JG8N166 – Frequently Asked Questions
1) Will the Metallics JG8N166 hex nut thread onto a 1/2-13 bolt or threaded rod?
Yes. The JG8N166 is a 1/2 inch nut cut at 13 threads per inch, which is standard UNC coarse thread for 1/2 inch fasteners. It mates with any 1/2-13 bolt, anchor stud, or coarse-thread rod. It will not fit 1/2-20 fine thread.
2) Is the Metallics JG8N166 a Grade 8 nut, and what does that mean for the bolt I pair it with?
It is a Grade 8 hardened steel nut, measured at Rockwell C24-32. Grade 8 nuts are made to match Grade 8 bolts so the nut does not strip before the bolt reaches its rated load. Pairing a Grade 8 nut with a lower grade bolt is fine mechanically, but the joint is only as strong as the bolt.
3) Can I use the Metallics JG8N166 Grade 8 nut on a Buy American or ARRA funded project?
No. The JG8N166 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. On federally funded work with domestic sourcing requirements you will need a domestically produced Grade 8 nut instead.
4) What wrench or socket size do I need for a Metallics 1/2-13 Grade 8 hex nut?
Across the flats the nut measures 0.840 to 0.866 inches, so a 13/16 inch socket or wrench is the fit. Across the corners it runs 0.736 to 0.750 inches on the listed head width figure, and overall nut height is 0.427 to 0.448 inches, which matters if you are working in a tight channel or against a strut flange.
5) Is the zinc finish on this Metallics Grade 8 hex nut good enough for outdoor or damp installs?
The JG8N166 carries a zinc plated finish over hardened steel. Zinc plating handles indoor, concealed, and sheltered mechanical room conditions well, and tolerates occasional damp. For continuous wet exposure, direct weather, or coastal work, step up to hot dip galvanized or stainless hardware instead.
6) How many nuts come in a jar of Metallics JG8N166, and can I order fewer?
Each jar holds 50 nuts, and 50 each is the order minimum, so the jar is the smallest unit sold. The filled jar weighs 1.85 lbs. Other sizes and quantities can be requested if 1/2-13 in a 50 count jar is not what the job needs.
7) Does the Metallics JG8N166 nut meet a dimensional spec I can cite on a submittal?
Dimensions follow ANSI/ASME B182.2, and the steel is specified to AISI 1021 - 1045. Those two callouts plus the Grade 8 designation are what a spec reviewer normally wants to see on a hardened hex nut submittal.
8) Should I use a Grade 8 hex nut or a standard zinc hex nut for threaded rod hangers?
For ordinary conduit and pipe hangers a standard Grade 2 or Grade 5 zinc nut is usually all the spec calls for. Reach for the Grade 8 JG8N166 when the rod or bolt itself is Grade 8, when the connection is carrying real tension or vibration, or when the engineer has called out matched hardened hardware. The Rockwell C24-32 hardness is what lets the nut develop the bolt's full rated load rather than stripping first.
How fast can I get the Metallics JG8N166 delivered?
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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 JG8N166 come with a warranty?
Absolutely. The Metallics JG8N166 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 JG8N166?
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