Metallics JRM15SLT 4-40 x 3/8 ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
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Metallics JRM15SLT 4-40 x 3/8 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

Metallics JRM15SLT 4-40 x 3/8 in. Round Head Slotted Machine Screws - Steel Zinc - Each

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Model: JRM15SLT
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$50.16
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4-40 x 3/8 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

  • Features

    • Round head with slotted Drive
    • Steel Zinc Material
    • 4-40 Diameter, 3/8" Length

  • 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 Height:
0.075 - 0.086 in.
Fastener Head Type:
Round
Fastener Head Width:
0.193 - 0.211 in.
Fastener Length:
8-Mar
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:
0.16 lbs
Product Width:
3 in
Recess Penetration Gaging Depth:
0.046 - 0.065
Slot Depth:
0.044 - 0.058
Slot Width:
0.031 - 0.039
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 JRM15SLT – Frequently Asked Questions

1) Will a 4-40 x 3/8 in. machine screw work for mounting a device or plate in an electrical box?
The Metallics JRM15SLT is a 4-40 thread screw, 40 threads per inch, 3/8 inch long, with a round head and a slotted drive. That's the small machine screw size used for terminal screws, small device and plate mounting, and fixture hardware. Note the common electrical device and cover plate thread is 6-32, not 4-40, so check the female thread in your box or device before ordering: 4-40 will not engage a 6-32 tapped hole.
2) How are the Metallics JRM15SLT machine screws packaged and what is the minimum order?
They come in a jar, with a 100-count minimum order. That's the format for a shop drawer or a service van, not a bulk box.
3) Are zinc plated steel machine screws OK for outdoor or damp locations?
The JRM15SLT is carbon steel with a zinc finish, made from AISI 1006 to 1022 steel. Zinc plating handles indoor and dry locations fine, but it is a sacrificial coating, not stainless, so in wet, washdown, coastal or corrosive settings it will eventually rust. Specify a stainless 4-40 machine screw for those openings.
4) How strong are these Metallics 4-40 screws, and will they snap if I torque them down?
Minimum tensile strength is 60,000 psi, with hardness of Rockwell B70 to B100, which is standard low carbon steel machine screw territory. At a 4-40 diameter the thread itself is the limit, not the grade, so these are for holding devices, covers and small hardware in place. Don't treat them as a structural or load bearing fastener.
5) Do these Metallics screws meet Buy American or ARRA requirements for a government job?
Metallics lists the JRM15SLT as ARRA compliant and Buy American compliant, with China as the country of origin. If your contract requires domestically manufactured fasteners rather than ARRA-style compliance, verify against your specific contract clause.
How fast can I get the Metallics JRM15SLT 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 JRM15SLT come with a warranty?
Absolutely. The Metallics JRM15SLT 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 JRM15SLT?
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 JRM15SLT 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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