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Nuts 5/16-18 Hx Ny-Ins Locknut SS (Jar 100)
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
- Dimensional Standard:
- ASME B18.16.6
- Division:
- Electrical H1
- Fastener Head Height:
- 0.329 - 0.359 in.
- Fastener Head Width:
- 0.489 - 0.502 in.
- Fastener Height:
- 0.25
- 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:
- 1.15 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 18
- 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 JNYN164SS – Frequently Asked Questions
1) Will a 5/16-18 nylon insert lock nut thread onto my existing 5/16 inch bolts?
The Metallics JNYN164SS is a 5/16-18 hex nylon insert lock nut, cut to 18 threads per inch per ANSI/ASME B1.1. That is the standard UNC coarse pitch for 5/16 inch, so it mates with any standard coarse-thread 5/16 bolt, stud, or all-thread rod. If your rod is 5/16-24 fine thread, this nut will not run on it.
2) Are these lock nuts stainless, and will they hold up outdoors or in a wet mechanical room?
They are 18-8 stainless steel, the austenitic 300 series grade used for general corrosion resistance. That makes them suitable for damp interiors, exterior strut and hanger work, and rooftop mechanical equipment. For chloride-heavy or coastal exposure, 316 stainless is the step up.
3) Are these nylon insert lock nuts Buy American or ARRA compliant for a government job?
No. The JNYN164SS is not Buy American compliant and is not ARRA compliant; country of origin is listed as multiple. If your project carries a domestic sourcing requirement, this part will not satisfy it.
4) What wrench or socket size fits these 5/16-18 hex nylon lock nuts?
Across the flats the nut measures 0.489 to 0.502 inch, so a 1/2 inch wrench or socket is the right tool. Overall nut height runs 0.329 to 0.359 inch.
5) Do these nylon insert lock nuts meet a dimensional spec I can put on a submittal?
Yes. The JNYN164SS is built to ASME B18.16.6, the dimensional standard for prevailing-torque nylon insert lock nuts, with threads to ANSI/ASME B1.1. Material hardness is Rockwell B95-C35.
6) How many 5/16-18 stainless lock nuts come in a jar, and is there a minimum order?
These ship 100 to a jar, and the jar is the order minimum, so one jar is the smallest buy. The packed jar weighs 1.15 lbs. Metallics makes other sizes and quantities in the JNYN series available on request.
7) Can I use nylon insert lock nuts on hot pipe hangers or near high-heat equipment?
Be careful there. The locking element is nylon, so sustained heat is the limiting factor rather than the stainless body. For hanger rod and strut at ambient or warm conditions these are fine, which is the HVAC, plumbing, and electrical service they are listed for. For high-temperature joints, use an all-metal prevailing torque nut or a jam nut instead.
8) Can a nylon insert lock nut be reused after I take the joint apart?
Treat them as single-use for anything that matters. The nylon collar is deformed by the bolt threads on first installation, so prevailing torque drops on each reinstall. With 100 nuts to a jar, replacing rather than reusing is the practical call on service work.
How fast can I get the Metallics JNYN164SS 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 JNYN164SS come with a warranty?
Absolutely. The Metallics JNYN164SS 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 JNYN164SS?
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