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Nuts 1/2-13 Hx Ny-Ins Locknut St-zn (Jar 50)
Features
- Eliminates the Need For a Lockwasher
Additional Notes
- Other sizes and quantities available by request
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:
- 0.579 - 0.609 in.
- Fastener Head Width:
- 0.736 - 0.752 in.
- Fastener Height:
- 0.464
- 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:
- 50
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 3.6 in
- Product Length:
- 3 in
- Product Weight:
- 2.26 lbs
- Product Width:
- 3 in
- 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:
- JNYN
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Nylon Insert Lock Nut
- Product Material:
- Steel
Metallics JNYN166 – Frequently Asked Questions
1) Will a 1/2-13 nylon insert lock nut thread onto standard 1/2 inch UNC bolts and all-thread rod?
Yes. The Metallics JNYN166 is a 1/2-13 nut, 13 threads per inch, cut to ANSI/ASME B1.1, which is the standard 1/2 inch UNC coarse thread used on common bolts, hex head screws, and 1/2-13 all-thread rod. It will not fit 1/2-20 fine thread.
2) Do I still need a lock washer with a nylon insert lock nut?
No. The nylon insert does the work of the lock washer, so the JNYN166 is used on its own. The nylon collar deforms around the bolt threads and resists backing off, which is why these get specified in high vibration locations and on electrical, plumbing, and HVAC work. Use a flat washer if you need to spread load on soft material, but no split washer is required.
3) Will these locknuts meet a Buy American or ARRA requirement on a federal job?
No. The JNYN166 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your project carries a domestic sourcing clause, these will not qualify.
4) What wrench or socket size do I need for the Metallics JNYN166 locknut?
Across the flats the nut measures 0.736 to 0.752 inch, which is a 3/4 inch wrench or socket. Overall nut height runs 0.579 to 0.609 inch, so allow for that when you size a socket depth or figure bolt stick-out.
5) Can nylon insert lock nuts be reused after they are taken off?
Treat them as limited reuse. The locking action on the JNYN166 comes from a nylon insert that is cut by the bolt threads on first installation, so prevailing torque drops each time it is removed. For anything carrying vibration, install a fresh nut. Buying them 50 to a jar makes that practical.
6) How many 1/2-13 locknuts come in a jar, and what is the smallest quantity I can order?
They ship 50 to a jar, and 50 each is the order minimum. Jar weight is 2.26 lbs. Metallics also offers other sizes and quantities in the JNYN series by request.
7) Are these zinc plated locknuts OK for outdoor or damp locations?
The JNYN166 is steel with a zinc finish, which suits dry interior and protected locations. Zinc plating gives moderate corrosion resistance only, so for direct weather exposure, wet wells, coastal sites, or chemical areas, specify a stainless nut instead.
8) Can I use a nylon insert locknut where the joint gets hot, like on a boiler or flue hanger?
Pick a different nut for high heat. The locking element here is nylon, which softens and loses grip as temperature climbs, so the JNYN166 belongs on ambient temperature work such as electrical supports, plumbing, and HVAC hangers in high vibration areas. For hot assemblies use an all metal prevailing torque nut or a jam nut arrangement.
9) What dimensional standard do Metallics JNYN hex nylon insert lock nuts follow?
They are built to ASME B18.16.6, the standard for prevailing torque nuts, with threads to ANSI/ASME B1.1. That matters on spec driven work: a submittal calling for a B18.16.6 nylon insert hex locknut in 1/2-13 is satisfied by the JNYN166.
How fast can I get the Metallics JNYN166 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 JNYN166 come with a warranty?
Absolutely. The Metallics JNYN166 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 JNYN166?
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installation tips, and troubleshooting. Contact Us
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