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Nut 4-40 Hx Nut Ny (Jar 100)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Nuts
Metallics JNN157 – Frequently Asked Questions
1) What thread size does the Metallics JNN157 hex nut take?
The JNN157 is a 4-40 hex nut, so it threads onto any #4-40 UNC machine screw or stud. That is the small machine screw size used on device plates, panel hardware, and terminal and enclosure assemblies. If your screw is 6-32 or 8-32, this nut will not thread on.
2) Is the JNN157 a nylon insert lock nut or a plain hex nut?
The JNN157 is described as a 4-40 hex nut, nylon. It is a nylon nut in a hex pattern, which is what electricians reach for where a non-conductive fastener is wanted on a 4-40 screw. It is not a steel nylon-insert locknut.
3) How many nuts come in the Metallics JNN157 pack?
It ships as a jar of 100 4-40 hex nuts. The jar pack is the usual MRO and service-truck quantity for small machine screw hardware, so one unit covers a lot of device and panel work without reordering.
4) Can I use a 4-40 nylon hex nut where I need the fastener to be non-conductive?
Yes. A nylon nut does not conduct, which is why the 4-40 JNN157 gets used for isolating hardware, standoff and insulator stacks, and panel assemblies inside electrical enclosures. For structural or high-torque joints, use a steel nut instead; nylon will strip well before steel does.
5) What wrench or driver fits a 4-40 nylon hex nut?
It is a hex pattern, so a small nut driver or an open-end wrench sized to #4-40 nut hardware will turn it. Snug it by hand or with light torque only; nylon threads deform if you wrench them down like steel.
How fast can I get the Metallics JNN157 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 JNN157 come with a warranty?
Absolutely. The Metallics JNN157 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 JNN157?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics JNN157 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.