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Screw 4-40 x 1/4 RH PH MS St-Zn (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 JRMP440 – Frequently Asked Questions
1) Are these zinc plated steel screws OK for outdoor or damp locations?
The JRMP440 is steel with zinc plating, which is a dry indoor-rated finish. Zinc gives light corrosion protection for interior boxes, panels, and enclosures, but it isn't a wet-location or coastal finish. For exterior, damp, or washdown work, specify stainless steel machine screws in the same 4-40 x 1/4 size instead.
2) Will a 4-40 x 1/4 machine screw thread into a sheet metal electrical box?
Only if the hole is already tapped 4-40. A machine screw cuts no threads of its own, it needs a matching tapped hole or a 4-40 nut. Standard device and box mounting holes in the trade are 6-32 and 8-32, so a 4-40 like the JRMP440 is for small instrument plates, terminal blocks, and equipment prepped specifically for 4-40. Check the hole before you order.
3) What head style and driver does the JRMP440 screw take?
Round head with a Phillips recess, so you drive it with a Phillips bit, typically a #1 on a #4 screw. The round head sits proud of the surface with a domed profile rather than sitting flush, so don't substitute it where a drawing calls for a flat head in a countersunk hole.
4) How many screws come in a jar of Metallics JRMP440?
100 screws per jar. The jar pack is how Metallics ships these for bench and van stock, so an electrician or maintenance tech restocking a truck bin gets a countable 100 rather than a loose bag.
5) What is the Metallics part number for the 4-40 x 1/4 round head Phillips screw?
Metallics JRMP440. One model covers the whole offering, so there are no finish or length options to pick, you are ordering the zinc plated steel 4-40 x 1/4 round head Phillips in the 100 count jar.
How fast can I get the Metallics JRMP440 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 JRMP440 come with a warranty?
Absolutely. The Metallics JRMP440 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 JRMP440?
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 JRMP440 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.