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Nuts 5/16-18 Hx Ny-Ins Locknut St-zn (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Features
- Eliminates the Need For a Lockwasher
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Dimensional Standard:
- ASME B18.16.6
- Division:
- Electrical H1
- Fastener Head Height:
- 0.329 - 0.359 in.
- Fastener Head Width:
- 0.489 - 0.502 in.
- Fastener Height:
- 0.25
- Field Application:
- Areas of High Vibration, Electrical, Plumbing, Heating and Air Conditioning Industries
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Nylon_Insrt_Lck_Nut_Steel_Zinc.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:
- 1.18 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 18
- 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:
- JNYN
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Nylon Insert Lock Nut
- Product Material:
- Steel
Metallics JNYN164 – Frequently Asked Questions
1) What thread size does the Metallics JNYN164 nylon insert lock nut take?
It's a 5/16-18 nut, so it threads onto 5/16 inch coarse (UNC) bolts, studs, and rod at 18 threads per inch. Threads are cut to ANSI/ASME B1.1, so it mates with any standard 5/16-18 fastener.
2) Do I still need a lock washer with a nylon insert locknut?
No. The nylon insert grips the bolt threads and resists back-off on its own, which eliminates the need for a lockwasher. That saves a part in the stack and keeps the clamped height shorter, which matters when you're landing equipment on strut or a panel flange with limited thread sticking out.
3) Will a zinc plated steel locknut hold up in a high vibration mounting?
That's the intended use. Metallics lists the JNYN series for areas of high vibration along with electrical, plumbing, and HVAC work, so rooftop units, blowers, pumps, and vibrating equipment mounts are the target application. The body is steel with a zinc finish, which is suited to dry interior and protected locations rather than direct weather or corrosive exposure.
4) Is the Metallics JNYN164 locknut Buy American or ARRA compliant for a federal job?
No on both counts. The JNYN164 is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. If your contract carries a domestic sourcing clause, this nut will not satisfy it and you'll need a domestically produced fastener instead.
5) Does this locknut meet a dimensional spec I can put on a submittal?
The nut is made to ASME B18.16.6, the dimensional standard for prevailing torque nylon insert lock nuts, with threads to ANSI/ASME B1.1. Those are the two designations to cite on a submittal or a spec sheet review.
6) Should I use a nylon insert locknut or an all metal lock nut on a hot application?
Go all metal if there is heat. The nylon collar in the JNYN series is a polymer element, so it is the wrong choice near flue pipe, burner assemblies, or anywhere service temperature climbs. For ordinary electrical, plumbing, and HVAC mounting at ambient temperature, which is what this nut is listed for, the nylon insert is the simpler option because it replaces a separate lockwasher.
7) Can nylon insert locknuts be reused if I have to take the connection apart?
Treat them as limited reuse. The nylon collar deforms around the bolt threads on first installation, so prevailing torque drops each time you run the nut off and back on. With 100 nuts to a jar, the practical call on a service job is to throw the old ones away and spin on fresh ones rather than chase a loose joint later.
How fast can I get the Metallics JNYN164 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 JNYN164 come with a warranty?
Absolutely. The Metallics JNYN164 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 JNYN164?
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