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Nuts 4-40 Hx Nut SS (Jar 100)
Features
- Six-sided internally threaded fastener whose thickness is 0.875 D is the nominal nut size and 1.5 D is their width across the flats, made from austenitic alloys.
- Designed for use with stainless steel bolts and screws with a specified minimum tensile strength equal to or less than the specified proof stress of the mating nut. Both type of stainless are corrosion resistant with 316 stainless having greater such resistance as well as superior strength at raised temperatures.
Additional Notes
- Other sizes and quantities available by request
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Division:
- Electrical H1
- Fastener Head Width:
- 0.241 - 0.250 in.
- Fastener Height:
- 0.087 - 0.098
- Fastener Width:
- 0.275 - 0.289
- Language Code:
- EN
- Order Minimum Imperial:
- 100
- Order Minimum Uom Imperial:
- CT
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 2.15 in
- Product Length:
- 3 in
- Product Weight:
- 0.18 lbs
- Product Width:
- 3 in
- Sub Division:
- Electrical-E H2
- Thread Per Inch:
- 40
- Thread Standard:
- ANSI/ASME B18.2.2
- Department:
- Electrical
- Product Subgroup:
- Nuts
- Product Type:
- Hexagonal Nut
- Type2:
- Hexagonal Nut
- Series:
- JSN
- Product Details:
- Hexagonal Nut
- Product Material:
- 18-8 Stainless Steel
Metallics JSN26 – Frequently Asked Questions
1) What thread size are the Metallics JSN26 hex nuts, and will they fit a 4-40 machine screw?
The JSN26 is a 4-40 hex nut, so it mates with any #4 machine screw cut at 40 threads per inch, the standard UNC pitch for a #4. The thread conforms to ANSI/ASME B18.2.2.
2) Are these Metallics hex nuts 18-8 or 316 stainless?
The JSN26 nuts are 18-8 stainless steel. Both 18-8 and 316 are corrosion resistant, but 316 has greater corrosion resistance and better strength at elevated temperatures. For wet, coastal or chemical exposure, specify a 316 nut instead; for general indoor electrical and panel work, 18-8 is the usual choice.
3) What wrench or nut driver size do I need for these 4-40 stainless hex nuts?
Across the flats the JSN26 nut measures 0.241 to 0.250 inch, so a 1/4 inch wrench, nut driver or socket is the fit. Across the corners it runs 0.275 to 0.289 inch, which matters if you are working inside a tight knockout or enclosure. Nut height is 0.087 to 0.098 inch.
4) What grade of bolt should I pair with these stainless nuts so the joint does not strip?
Pair the JSN26 with stainless steel bolts or screws whose specified minimum tensile strength is equal to or less than the proof stress of the nut. That keeps the bolt as the weaker member and stops the nut thread from stripping first. Running a higher strength alloy screw into an 18-8 nut is how threads get pulled.
5) Do these Metallics nuts meet Buy American or ARRA requirements for a public project?
The JSN26 is flagged compliant for both ARRA and Buy American in the manufacturer data. Country of origin is listed as China, so if your specification requires domestic melt and manufacture rather than ARRA/Buy American program compliance, confirm which standard your contract actually cites.
6) Is a 4-40 stainless hex nut right for small electrical device and enclosure screws?
A 4-40 hex nut is the size used with #4 machine screws on device plates, small terminal hardware and sheet metal enclosure work. Being 18-8 stainless, it resists rust where a plated steel nut would bloom, and the 1/4 inch flats let you hold it with a small driver in a crowded box. For anything larger than a #4 screw you need a different nut size.
7) How many nuts come in a jar of Metallics JSN26?
They ship in a jar of 100 count, and 100 is the order minimum. The filled jar weighs 0.18 lbs.
8) Can I get the JSN hex nuts in other thread sizes or larger quantities?
Yes. The JSN series runs other sizes and pack quantities by request; the JSN26 covers 4-40 in a 100 count jar. If you are standardizing a panel shop or MRO crib on a range of stainless hex nuts, ask for the other sizes in the series.
How fast can I get the Metallics JSN26 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 JSN26 come with a warranty?
Absolutely. The Metallics JSN26 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 JSN26?
You can call, text, or email our expert support team for fast answers. We’re here to help with
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selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics JSN26 from ZenSupply?
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