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Nuts 1/4-20 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:
- 0.298 - 0.328 in.
- Fastener Head Width:
- 0.430 - 0.439 in.
- Fastener Height:
- 0.225
- 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:
- 0.8 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 20
- 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 JNYN163 – Frequently Asked Questions
1) What thread size is the Metallics JNYN163 nylon insert lock nut?
The JNYN163 is a 1/4-20 nylon insert hex lock nut, so 20 threads per inch on a 1/4 inch bolt, cut to ANSI/ASME B1.1. It mates with any standard 1/4-20 UNC bolt, screw, or threaded rod.
2) Will a 1/4-20 nylon insert locknut hold up on equipment that vibrates?
That is exactly what it is for. Metallics lists this hex nylon insert lock nut for areas of high vibration along with electrical, plumbing, and heating and air conditioning work, so it suits strut hangers, blower and fan mounts, condensing unit brackets, and panel assemblies that see constant movement.
3) Can I use these nuts on a Buy American or ARRA funded job?
No. These Metallics 1/4-20 nylon insert locknuts are not Buy American compliant and are not ARRA compliant, with country of origin listed as multiple. On a federally funded project with domestic sourcing requirements you will need a domestically manufactured locknut instead.
4) Do I still need a lock washer with a nylon insert lock nut?
No. The nylon collar inside the nut grips the bolt threads and resists backing off on its own, which eliminates the need for a lockwasher in the stack. That also means you do not have to account for washer thickness when figuring bolt length.
5) What wrench or socket size fits this locknut?
Across the flats the hex measures 0.430 to 0.439 inch, which is the 7/16 inch hex standard for a 1/4-20 nut, so a 7/16 socket or wrench is the right tool. Overall nut height runs 0.298 to 0.328 inch.
6) Is this locknut plated for use in damp or outdoor locations?
It is zinc plated steel. Zinc gives general corrosion protection for indoor and sheltered outdoor work, which covers most electrical and mechanical room use. For direct weather exposure, continuous wet service, or coastal sites, step up to a stainless nylon insert locknut instead.
7) How many nuts come in a jar, and can I buy fewer than that?
The JNYN163 ships as a jar of 100, and the jar is the order minimum, so 100 pieces is the smallest quantity. Metallics does offer other sizes and quantities by request if you need a different count or thread size.
8) Does this nylon insert locknut meet a recognized dimensional spec for submittals?
Yes, it is built to ASME B18.16.6, the dimensional standard for prevailing-torque nylon insert lock nuts, with threads to ANSI/ASME B1.1. Those two are what a spec reviewer or inspector will be looking for on a fastener submittal.
9) Can a nylon insert locknut be reused after I take the joint apart?
Treat it as a limited-reuse fastener. The nylon collar deforms around the bolt threads to create the locking action, and that grip drops off each time it is cycled. With a jar of 100 on hand it is cheaper to install a fresh nut on reassembly than to risk a loose joint on a vibrating piece of equipment.
10) Is there a temperature limit on a nylon insert locknut?
The locking element is nylon, so it is not a high-heat fastener. Keep it off flue connections, boiler breeching, and anything near open flame, and use an all-metal prevailing-torque or jam nut there. For normal electrical, plumbing, and HVAC service, which is what Metallics lists it for, the nylon collar is fine.
How fast can I get the Metallics JNYN163 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 JNYN163 come with a warranty?
Absolutely. The Metallics JNYN163 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 JNYN163?
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