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Nuts 3/4-10 G8 Hx Ny-Ins Locknut St-Yz (Jar 25)
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- N
- Buy American Compliant:
- No
- Dimensional Standard:
- ASME B18.16.6
- Division:
- Electrical H1
- Fastener Head Height:
- 0.860 - 0.890 in.
- Fastener Head Width:
- 1.052 - 1.064 in.
- Fastener Height:
- 0.742
- Grade:
- 8
- Language Code:
- EN
- Order Minimum Imperial:
- 25
- Order Minimum Uom Imperial:
- EA
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Remarks:
- The catalog UPC differ from the tarnsaction daat spreadsheet UPC
- Sub Division:
- Electrical-E H2
- 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:
- JG8NYN
- Product Finish:
- Zinc
- Product Details:
- Hexagonal Nylon Insert Lock Nut
- Product Color:
- Yellow
- Product Material:
- Steel
Metallics JG8NYN168 – Frequently Asked Questions
1) What thread size does the Metallics JG8NYN168 nylon insert lock nut take?
It is a 3/4-10 nut, meaning 3/4 inch nominal diameter with 10 threads per inch, which is the UNC coarse pitch for that diameter. Threads are cut to ANSI/ASME B1.1, so it runs onto any standard 3/4-10 UNC bolt, rod, or stud. For 3/4-16 fine thread you need a different nut.
2) Will a Grade 8 nylon insert locknut hold up on a high strength bolted connection?
Grade 8 is the rating on the JG8NYN168, so it is matched to Grade 8 bolting rather than the common Grade 5 or Grade 2 hardware. Use it where the joint is specified for high strength fasteners, such as heavy equipment mounting, strut and trapeze anchorage, or vibration-prone machine bases. The nylon ring resists loosening under vibration without needing a separate lock washer.
3) Does this Metallics locknut meet Buy American or ARRA requirements for a federal job?
No. The JG8NYN168 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. If your project has domestic sourcing requirements written into the spec, this part will not satisfy them.
4) What wrench or socket size do I need for this 3/4-10 nylon insert locknut?
Across the flats the nut measures 1.052 to 1.064 inches, so a 1-1/16 inch socket or wrench is the fit. Overall height runs 0.860 to 0.890 inches with a fastener height of 0.742 inches, which matters if you are working in a shallow pocket or need to know how much thread projection to leave.
5) Can a nylon insert lock nut be reused if I have to take the connection apart?
The nylon ring in the JG8NYN168 deforms around the bolt threads the first time it is run on, and it loses prevailing torque with each reuse. For anything structural or vibration-critical, fit a new nut on reassembly. That is part of why these ship 25 to a jar rather than as singles.
6) Is this nylon insert locknut suitable for outdoor or damp locations?
The nut is steel with a yellow zinc finish, which gives moderate corrosion resistance for general indoor and sheltered outdoor use. It is not stainless, so for continuous wet exposure, coastal air, or chemical environments, specify a stainless or hot dip galvanized nut instead. Also note the nylon insert limits service temperature, so avoid high heat locations.
7) What dimensional standard does this hex nylon insert locknut conform to?
Dimensions follow ASME B18.16.6, the standard for prevailing torque nuts, and threads follow ANSI/ASME B1.1. If your drawing calls out a B18.16.6 nylon insert hex locknut in 3/4-10, this is that nut.
8) How many 3/4-10 locknuts come in a jar and what is the smallest quantity I can order?
They come packaged 25 per jar, and 25 each is the order minimum. If you need a different size or a different pack count, Metallics offers other sizes and quantities by request.
9) Do I still need a lock washer with a nylon insert locknut?
No. The nylon ring supplies the prevailing torque, so the nut resists backing off on its own and a split or tooth lock washer adds nothing. A plain flat washer is still worth using on soft or oversized-hole material to spread the bearing load.
10) What is the Metallics part number for the 3/4-10 Grade 8 yellow zinc nylon insert locknut?
Order it as JG8NYN168, from the Metallics JG8NYN series of Grade 8 hex nylon insert locknuts in steel with a yellow zinc finish.
How fast can I get the Metallics JG8NYN168 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 JG8NYN168 come with a warranty?
Absolutely. The Metallics JG8NYN168 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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