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Nuts 1/2-20 Hx Ny-Ins Locknut St-zn (Jar 100)
Additional Notes
- Other sizes and quantities available by request
Features
- Made to American Standard Dimensions
Manufacturer Resources
Product Specs
- Arra Compliant:
- U
- Buy American Compliant:
- U
- 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:
- Width is Wrench Size
- 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:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 5.75 in
- Product Length:
- 3.5 in
- Product Weight:
- 4.38 lbs
- Product Width:
- 3.5 in
- Sub Division:
- Electrical-E H2
- Thread Direction:
- Right Hand
- Thread Per Inch:
- 20
- Thread Standard:
- ANSI/ASME B1.1
- Thread Type:
- UNF
- 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 Color:
- Silver
- Product Material:
- Steel
Metallics JNYN177 – Frequently Asked Questions
1) Will a 1/2-20 nylon insert lock nut thread onto a standard 1/2 inch bolt?
Only onto a 1/2 inch bolt cut with UNF (fine) threads at 20 threads per inch. The Metallics JNYN177 is a 1/2-20 UNF, right hand thread nut built to ANSI/ASME B1.1. If your bolt is 1/2-13, that is the UNC coarse pitch and this nut will not run on it.
2) What wrench or socket size do I need for the Metallics JNYN177 locknut?
Across the flats it measures 0.736 to 0.752 inch, and Metallics notes the width is the wrench size. That puts it in a 3/4 inch socket or wrench.
3) How much bolt thread do I need sticking out to fully engage this nylon insert locknut?
Allow for the full nut height so the bolt drives through the nylon collar at the top. The nut's overall height runs 0.579 to 0.609 inch, so plan on at least that much usable thread past the joint, ideally a thread or two more so the nylon grabs clean threads.
4) Is a nylon insert locknut the right choice for a vibrating assembly, or should I use a lock washer?
A nylon insert nut is the better pick where vibration would back a plain nut off. The nylon collar in the JNYN177 deforms around the bolt threads and resists loosening by friction, with no washer to seat or crush. Trade-off: the collar is a one-use-ish, non-metallic element, so it is not for high heat service and should not be reused many times. Where you need a metal-only, higher temperature solution, a prevailing torque all-metal nut or a jam nut is the alternative.
5) Will zinc plated steel locknuts hold up outdoors or in a damp electrical vault?
The JNYN177 is steel with a zinc finish, silver in appearance. Zinc plating handles indoor, dry, and sheltered conditions and light moisture exposure, but it is a sacrificial coating, not stainless. For continuous wet, coastal, or corrosive service, specify a stainless or hot dip galvanized nut instead.
6) How many 1/2-20 locknuts come in a jar and can I buy a smaller count?
They ship as a jar of 100 pieces, and 100 count is the order minimum, so that jar is the smallest buy. Metallics offers other sizes and quantities in the JNYN series by request.
7) Do these locknuts meet a published dimensional standard for submittals?
Yes. The JNYN177 is made to ASME B18.16.6 for the nut dimensions and ANSI/ASME B1.1 for the thread form, which is what a spec calling out American Standard hex nylon insert locknuts expects.
8) What does a jar of 100 of these 1/2-20 locknuts weigh for shipping or a job box?
About 4.38 lbs for the jar of 100. The container itself is 3.5 in by 3.5 in by 5.75 in, so it drops into a gang box or van shelf without repacking.
9) What is the Metallics part number for the 1/2-20 hex nylon insert locknut in zinc?
JNYN177, from the Metallics JNYN series of hex nylon insert lock nuts in zinc plated steel, sold 100 to a jar.
How fast can I get the Metallics JNYN177 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 JNYN177 come with a warranty?
Absolutely. The Metallics JNYN177 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 JNYN177?
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