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Nuts 5/8-11 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:
- 0.735 - 0.765 in.
- Fastener Head Width:
- 0.922 - 0.940 in.
- Fastener Height:
- 0.593
- 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 Per Inch:
- 11
- 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 JG8NYN167 – Frequently Asked Questions
1) What thread size and pitch is the Metallics JG8NYN167 locknut?
It is a 5/8-11 nylon insert locknut, meaning 5/8 inch nominal diameter with 11 threads per inch, cut to the ANSI/ASME B1.1 thread standard. That is the standard UNC coarse pitch for 5/8 inch, so it runs onto any 5/8-11 coarse-thread bolt, rod, or stud. It will not fit 5/8-18 fine thread.
2) What does Grade 8 mean on this Metallics locknut, and what bolts should it be paired with?
Grade 8 is the high-strength tier for inch-series steel fasteners, so this 5/8-11 nut is intended to match Grade 8 bolts and cap screws. Pairing a Grade 8 nut with a lower grade bolt is fine mechanically, the bolt still governs, but pairing a Grade 5 nut on a Grade 8 bolt is what strips threads under full torque. Steel construction with a zinc finish.
3) Can I use these locknuts on a Buy American or ARRA funded project?
No. The JG8NYN167 is not Buy American compliant and is not ARRA compliant, with multiple countries of origin. On a federally funded job carrying domestic sourcing requirements you will need a domestically produced 5/8-11 Grade 8 locknut instead.
4) What wrench size do I need for a 5/8-11 Grade 8 nylon insert locknut?
Across the flats the nut measures 0.922 to 0.940 inch, which takes a 15/16 inch socket or wrench. Height across the top of the hex runs 0.735 to 0.765 inch, so allow at least that much clearance plus bolt stickout past the nylon collar.
5) Is a nylon insert locknut the right choice, or should I use a lock washer on this connection?
A nylon insert locknut like the JG8NYN167 resists loosening from vibration without needing a separate washer, because the nylon collar grips the bolt threads instead of relying on spring tension. It is reusable a handful of times but loses grip with repeated cycling, and the nylon limits it to moderate service temperatures. For high heat or frequent disassembly, an all-metal prevailing torque nut or a standard hex nut with a lock washer is the better call.
6) How many 5/8-11 locknuts come in a jar, and can I order a smaller count?
The JG8NYN167 ships as a jar of 25 pieces, and 25 each is the order minimum. Metallics does make other sizes and quantities available by request if 25 of this size is not what the job needs.
7) Does this Metallics locknut meet a published dimensional standard for spec submittals?
It is manufactured to ASME B18.16.6 for the nut dimensions and ANSI/ASME B1.1 for the threads. Those are the two references to cite on a submittal when a drawing calls for a standard prevailing torque hex locknut. Order under Metallics part number JG8NYN167, series JG8NYN.
8) Is this locknut yellow zinc or clear zinc plated?
Yellow. The JG8NYN167 is steel with a yellow zinc (zinc dichromate) finish, which is the usual visual marker for Grade 8 hardware on a jobsite and gives it more corrosion resistance than clear zinc. It is a plated coating, not hot-dip galvanized, so treat it as indoor or sheltered-exterior duty rather than fully exposed marine service.
How fast can I get the Metallics JG8NYN167 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 JG8NYN167 come with a warranty?
Absolutely. The Metallics JG8NYN167 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 JG8NYN167?
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