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Screw 4-40 x ½ FH PH 100° CSS 18-8 (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 JFMPCS412SS – Frequently Asked Questions
1) Is the JFMPCS412SS screw stainless steel?
Yes, 18-8 stainless. 18-8 is the austenitic 300 series grade commonly used for corrosion resistance in damp and outdoor electrical work, which is why it gets specified over plated carbon steel for exterior enclosures and wet locations.
2) What head style and driver does this 4-40 screw use, and will it sit flush?
Flat head with a Phillips recess, so you drive it with a Phillips bit. The head is a 100 degree flat head rather than the more usual 82 degree, so it seats flush only in a hole countersunk to 100 degrees. Dropping it into an 82 degree countersink leaves the head proud or bearing on the rim.
3) Can I use the 100 degree flat head 4-40 in a standard 82 degree countersink?
Not if you need it flush. A 100 degree head has a shallower, wider cone than the 82 degree standard, so in an 82 degree seat it contacts near the top edge and stands slightly above the surface. Order a 100 degree countersunk part only where the hole is prepped for 100 degrees, which is typical of sheet metal and thin panel prep.
4) How many screws come in a jar of Metallics JFMPCS412SS?
100 screws per jar. Metallics supplies this size in jar packaging rather than a bulk box, which is the format most electricians keep on the van for cover plate and device work.
5) Will a 4-40 machine screw thread into sheet metal or do I need a tapped hole?
This is a machine screw, not a self tapper. The 4-40 thread needs a tapped hole, a 4-40 nut, or an existing threaded boss. For an untapped panel you want a sheet metal or self drilling screw instead.
6) Is the JFMPCS412SS screw suitable for outdoor or corrosive electrical installations?
The 18-8 stainless material handles damp, exterior, and washdown conditions far better than zinc plated steel, and it will not bleed rust onto a finished panel. It's a Metallics electrical fastener, carried for enclosure, fixture, and device assembly work.
How fast can I get the Metallics JFMPCS412SS delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
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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 JFMPCS412SS come with a warranty?
Absolutely. The Metallics JFMPCS412SS 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 JFMPCS412SS?
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