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Nuts 1/4-20 Hx Ny-Ins Locknut SS (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
- Country Of Origin:
- MUL
- 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
- Hardness:
- Rockwell B95-C35
- Language Code:
- EN
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Nylon_Insrt_Lck_Nut_18-8_SS_316_SS.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:
- 0.84 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 Details:
- Hexagonal Nylon Insert Lock Nut
- Product Material:
- 18-8 Stainless Steel
Metallics JNYN163SS – Frequently Asked Questions
1) Will a 1/4-20 nylon insert lock nut thread onto standard 1/4-20 bolts and all-thread rod?
Yes. The Metallics JNYN163SS is a 1/4-20 thread, 20 threads per inch, cut to ANSI/ASME B1.1, so it runs on any standard 1/4-20 UNC bolt, screw or threaded rod. The nylon ring sits at the top of the nut and grips the male thread, which is why it needs no lockwasher behind it.
2) Will a nylon insert locknut hold on equipment that vibrates, like a rooftop condenser or a transformer frame?
That is the application it is built for. Metallics lists this nylon insert locknut for areas of high vibration and for the electrical, plumbing, heating and air conditioning trades. The nylon collar deforms around the bolt thread and resists backing off, which is why no lockwasher is used with it.
3) Can I use these on a federally funded or Buy American job?
No. These nuts are not Buy American compliant and not ARRA compliant, with country of origin listed as multiple. If your contract carries a domestic-sourcing clause, specify a domestically produced locknut instead.
4) Are these stainless locknuts suitable for outdoor or wet locations?
They are 18-8 stainless steel, the standard austenitic grade used for general corrosion resistance, so they hold up in damp and exterior service far better than zinc-plated steel. For salt spray or chlorinated environments, 316 stainless is the step up.
5) How many 1/4-20 stainless nylon insert locknuts come in a jar, and is there a minimum order?
The JNYN163SS ships as a jar of 100 pieces, and the jar is the order minimum, so one jar is the smallest buy. Jar weight is 0.84 lbs. Other sizes and quantities are available by request.
6) Do these locknuts meet a recognized dimensional standard for spec work?
Yes. The nut is made to ASME B18.16.6, the dimensional standard for prevailing-torque and nylon insert lock nuts, with threads to ANSI/ASME B1.1. That pairing is what a submittal reviewer looks for on a hex nylon insert locknut.
7) Is there a temperature limit I should watch with nylon insert locknuts near hot equipment?
Yes, and it is the one real limitation. The locking element is nylon, so sustained heat softens it and the prevailing torque falls away. On flue, boiler or high-temperature runs use an all-metal prevailing-torque or jam-nut arrangement instead. For typical electrical, plumbing and HVAC mounting work, which is what Metallics lists this nut for, it is fine.
8) Can these nylon insert locknuts be reused if I take the assembly apart?
Treat them as limited-reuse. The nylon collar is what creates the locking action, and each time the bolt threads cut through it the grip drops off. For a connection you expect to service repeatedly, plan on fresh nuts, which is part of why they sell by the 100-count jar.
9) How hard is the nut body, and will it gall on stainless bolts?
Hardness is Rockwell B95 to C35. Like any stainless-on-stainless pairing, 18-8 threads can gall if run down fast and dry, so drive them slow or use an anti-seize on long engagements.
How fast can I get the Metallics JNYN163SS delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 JNYN163SS come with a warranty?
Absolutely. The Metallics JNYN163SS is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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