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Nuts 1/2-13 G8 Ny-Ins Locknut St-YZ (Jar 50)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Dimensional Standard:
- ASME B18.16.6
- Division:
- Electrical H1
- Fastener Head Height:
- 0.579 - 0.609 in.
- Fastener Head Width:
- 0.736 - 0.752 in.
- Fastener Height:
- 0.464
- Grade:
- 8
- Language Code:
- EN
- Order Minimum Imperial:
- 50
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 13
- Thread Standard:
- ANSI/ASME B1.1
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Hexagonal Nylon Insert Lock Nut
- Type2:
- Hexagonal Nylon Insert Lock Nut
- Series:
- JG8NYN
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Nylon Insert Lock Nut
- Product Color:
- Yellow
- Product Material:
- Steel
Metallics JG8NYN166 – Frequently Asked Questions
1) What thread size is the Metallics JG8NYN166 nylon insert lock nut?
It's a 1/2-13 nut, meaning a 1/2 inch nominal diameter with 13 threads per inch, cut to ANSI/ASME B1.1. That's the standard UNC coarse pitch for 1/2 inch, so it runs onto any 1/2-13 bolt, rod, or stud. If your rod is 1/2-20 fine thread, this is the wrong nut.
2) Is a nylon insert locknut OK for hot locations like near motors, boilers or light fixtures?
No. The locking element here is nylon, not metal, so it isn't the fastener for high-heat service. For hot work pick an all-metal prevailing torque locknut or a hex nut with a mechanical lock. Use the JG8NYN166 for ambient-temperature structural and equipment mounting where vibration is the concern.
3) Does a Grade 8 locknut need a Grade 8 bolt to develop full strength?
Yes, match the grades. This nut is Grade 8 steel, so it is rated to carry the clamp load of a Grade 8 (or metric class 10.9) 1/2-13 bolt. Pair it with a Grade 2 or Grade 5 bolt and the bolt becomes the weak link, which is fine mechanically but means you cannot torque to Grade 8 values.
4) Will these lock nuts meet a Buy American or ARRA requirement on a federal job?
No. The JG8NYN166 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your contract carries domestic sourcing language, these will not pass. Specify a domestic-origin Grade 8 nylon insert locknut for that work.
5) What wrench or socket size fits a 1/2-13 Grade 8 nylon insert locknut?
Across the flats it measures 0.736 to 0.752 inch, which a 3/4 inch wrench or socket covers. Overall nut height is 0.579 to 0.609 inch, so allow for that plus the nylon collar when you figure thread stick-out on your bolt.
6) Do these locknuts conform to a dimensional standard so they'll match what's already on the job?
They're built to ASME B18.16.6, the dimensional standard for prevailing torque nylon insert lock nuts, with threads to ANSI/ASME B1.1. So the hex, height, and thread fit interchange with any other 1/2-13 locknut made to the same standards, which is what you want when you're topping off an existing bolt-up rather than starting fresh.
7) Should I use a nylon insert locknut or a plain hex nut with a lock washer on vibrating equipment?
For anything that vibrates, strut-mounted equipment, fan and motor bases, trapeze hangers, the nylon insert nut is the simpler answer: the collar grips the bolt threads directly and resists back-off without a second component to lose. A hex nut and split washer needs two parts and relies on tension staying in the joint. Where the JG8NYN166 doesn't apply is heat, frequent disassembly, or where a double-nut or all-metal locknut is spec'd on the drawing.
8) How many 1/2-13 locknuts come in a jar, and can I get other sizes?
The JG8NYN166 ships 50 pieces to a jar, and 50 each is the order minimum. Metallics makes other sizes and pack quantities in the JG8NYN series available by request if 1/2-13 isn't the size you need.
How fast can I get the Metallics JG8NYN166 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 JG8NYN166 come with a warranty?
Absolutely. The Metallics JG8NYN166 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 JG8NYN166?
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