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Screw 4-40 x 1/2 PN PH MS 18-8 SS (Jar 100)
Manufacturer Resources
Product Specs
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Screws
Metallics JSPMP142SS – Frequently Asked Questions
1) What size and thread are the Metallics JSPMP142SS machine screws?
They're 4-40 x 1/2 inch machine screws: a #4 diameter with 40 threads per inch, half an inch long under the head. The 4-40 thread is a standard UNC machine screw thread, so it mates with tapped #4-40 holes and standard 4-40 nuts.
2) Are these 4-40 screws stainless, and will they hold up outdoors or in damp locations?
They're 18-8 stainless steel, the common 300 series austenitic stainless used for corrosion resistance. That makes the JSPMP142SS a reasonable pick for damp, washdown, or coastal-adjacent work where plated carbon steel screws would rust, and it's non-magnetic in the annealed condition.
3) What head and drive type is on the Metallics JSPMP142SS screw?
Pan head with a Phillips drive. The pan head gives a rounded, low profile with a flat bearing surface, so it seats on top of the material rather than countersinking flush.
4) How many screws come in a jar of Metallics JSPMP142SS?
100 screws per jar. Metallics packs these in a screw-top jar rather than a bag or box, which is what electricians and MRO stockrooms want on a van shelf or bin wall, since it reseals and you can see the count.
5) Do I need a nut with the JSPMP142SS screws, or do they come with one?
The jar contains screws only, 100 of them, with no nuts or washers. Order 4-40 nuts and any flat or lock washers separately if the hole isn't already tapped.
6) What's the usable grip length on a 4-40 x 1/2 pan head screw?
Length is measured 1/2 inch from under the pan head to the tip, since pan head screws are measured under the head rather than overall. Allow for the thickness of whatever you're fastening plus enough thread engagement in the tapped hole or nut.
7) What's the exact part number to reorder these Metallics stainless machine screws?
Metallics part number JSPMP142SS. That one number covers the whole description: jar pack, stainless pan head Phillips machine screw, 4-40 x 1/2, 100 count.
How fast can I get the Metallics JSPMP142SS 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 JSPMP142SS come with a warranty?
Absolutely. The Metallics JSPMP142SS 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 JSPMP142SS?
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