Metallics JRM31SLT 5-40 x 1/2 ...
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Metallics JRM31SLT 5-40 x 1/2 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

Metallics JRM31SLT 5-40 x 1/2 in. Round Head Slotted Machine Screws - Steel Zinc - Each

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Model: JRM31SLT
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$50.17
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5-40 x 1/2 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

  • Features

    • 5-40 Diameter, 1/2" Length
    • Steel Zinc Material
    • Round head with slotted Drive

  • Additional Notes

    • In 1985, Metallics was the first fastener company in America to offer a full line of Combo’s! | Other sizes and quantities available by request | Tensile strength values for stainless screws are offered as approximations only; there is no single standard for the performance requirements of stainless machine screws.

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
C
Buy American Compliant:
C
Division:
Electrical H1
Drive Type:
Slotted
Fastener Head Type:
Round
Fastener Length:
2-Jan
Hardness:
Rockwell B70-B100
Language Code:
EN
Material Standard:
AISI 1006 - 1022
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Round_Head_Machine_Screw.pdf
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:
0.25 lbs
Product Width:
3 in
Sub Division:
Electrical-E H2
Tensile Strength:
60000 psi minimum
Thread Per Inch:
40
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Machine Screw
Type2:
Machine Screw
Series:
JRM
Product Finish:
Zinc
Product Details:
Machine Screw
Product Material:
Steel Zinc

Metallics JRM31SLT – Frequently Asked Questions

1) What size and thread is the Metallics JRM31SLT machine screw?
It's a 5-40 screw, 1/2 inch long: a #5 diameter machine screw thread with 40 threads per inch. That means it mates with a #5-40 tapped hole or a 5-40 nut, which is a small gauge used in device and enclosure work rather than general construction fastening.
2) Will a round head slotted screw sit flush in a countersunk hole?
No. The JRM31SLT has a round head, which domes above the surface and seats on the top of the material. For a flush finish in a countersunk or chamfered hole you want a flat head machine screw in the same 5-40 x 1/2 in. size instead. The drive is a straight slot, so a flat blade screwdriver is all it takes.
3) Do these Metallics machine screws meet Buy American / ARRA requirements for a public project?
The JRM31SLT is flagged as both ARRA compliant and Buy American compliant in the manufacturer data, with country of origin China. If your specification requires domestic melt and manufacture rather than ARRA-style compliance, treat those as two different tests and confirm which one the project is written to.
4) Are these Metallics 5-40 screws okay for damp or outdoor electrical work?
They're carbon steel with a zinc plating, which handles indoor and dry locations fine and gives light corrosion resistance. Zinc plated steel is not a marine or sustained wet-location finish, so for exterior, washdown, or coastal work use a stainless machine screw in the same 5-40 x 1/2 in. size.
5) How strong are these screws, and what steel are they made from?
The JRM31SLT is made from AISI 1006 to 1022 low carbon steel with a hardness of Rockwell B70 to B100 and a minimum tensile strength of 60,000 psi. That's standard low carbon machine screw strength, suited to clamping devices, covers, and plates, not to structural or high-torque load paths.
6) How many 5-40 x 1/2 in. screws come in a pack, and how are they packaged?
They ship in a jar of 100, which is the order minimum (100 count). The packed jar weighs 0.25 lbs. Handy for a shop bin or a service truck drawer where you're pulling a few at a time.
7) Is a 1/2 inch machine screw long enough for my application?
Half an inch of total screw length including the head means the usable thread engagement is less than that. Rule of thumb on a #5 thread: you want at least one diameter of thread engaged in the tapped hole or nut, so a 1/2 in. length works for thin sheet, device plates, and covers. Stacking gasket or spacer thickness will eat it quickly, and a longer 5-40 screw is the fix.
8) Is a slotted machine screw a problem if my crew runs impact drivers?
Yes, it can be. The JRM31SLT uses a straight slot drive, which cams out easily under a power driver and is best turned with a hand flat blade. If the crew is driving with power, pick a Phillips or combination head machine screw in the same 5-40 size. Metallics also offers combination drive screws across the line.
How fast can I get the Metallics JRM31SLT 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 JRM31SLT come with a warranty?
Absolutely. The Metallics JRM31SLT 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 JRM31SLT?
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 JRM31SLT 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.
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