Metallics JRM38SLT 5/16-18 x 1...
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Metallics JRM38SLT 5/16-18 x 1-1/2 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

Metallics JRM38SLT 5/16-18 x 1-1/2 in. Round Head Slotted Machine Screws - Steel Zinc - Each

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Model: JRM38SLT
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$50.44
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5/16-18 x 1-1/2 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

  • Features

    • Round head with slotted Drive
    • Steel Zinc Material
    • 5/16-18 Diameter, 1-1/2" 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:
0.198 - 0.216 in.
Fastener Head Type:
Round
Fastener Head Width:
0.557 - 0.59 in.
Fastener Length:
1/1/02
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:
5.75 in
Product Length:
3.5 in
Product Weight:
3.58 lbs
Product Width:
3.5 in
Recess Penetration Gaging Depth:
0.144 - 0.170
Slot Depth:
0.099 - 0.132
Slot Width:
0.072 - 0.084
Sub Division:
Electrical-E H2
Tensile Strength:
60000 psi minimum
Thread Per Inch:
18
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 JRM38SLT – Frequently Asked Questions

1) What thread size and length are the Metallics JRM38SLT machine screws?
They're 5/16-18 by 1-1/2 inches long, so 5/16 inch nominal diameter with 18 threads per inch, the standard UNC coarse pitch for that diameter. They'll run into any 5/16-18 tapped hole or nut.
2) Will a round head slotted machine screw sit flush, or does the head stand above the surface?
It stands proud. The JRM round head is a domed, non-countersinking head measuring 0.557 to 0.590 inch across with a head height of 0.198 to 0.216 inch, so it bears on top of the material rather than seating into a countersunk hole. If you need the head flush with the surface, you want a flat head machine screw instead.
3) How many screws come in a pack of Metallics JRM38SLT, and can I buy just a few?
They ship in a jar of 100 as the minimum order quantity, not as loose singles. Plan on 100 per jar when you're figuring job counts.
4) Are these zinc plated steel screws OK for outdoor or damp locations?
The JRM38SLT is zinc plated carbon steel, which is a mild corrosion coating meant for dry indoor and protected use. In wet, coastal, or washdown areas the plating gives up and the steel underneath rusts, so specify stainless for those openings.
5) Is this a Buy American compliant fastener for a government or institutional job?
Metallics lists the JRM38SLT as both Buy American and ARRA compliant, with country of origin China. Worth noting both of those together, since some agency specs require domestic melt and manufacture rather than the compliance flag alone.
6) What is the tensile strength and steel grade on these 5/16-18 machine screws?
Minimum tensile is 60,000 psi, with hardness Rockwell B70 to B100, made from AISI 1006 to 1022 low carbon steel. That's standard low carbon machine screw material, fine for panel, box, and device mounting, but it is not a Grade 5 or Grade 8 structural bolt and shouldn't be substituted for one.
7) Can I use these machine screws to mount electrical boxes and devices?
That's the intent. Metallics catalogs the JRM series as electrical supply fasteners, and a 5/16-18 round head slotted screw is used for strut, box, and bracket hardware where a blunt threaded screw goes into a tapped hole or a nut. For device yokes to a box you'd want the smaller 6-32 or 8-32 sizes instead, not 5/16.
8) Do machine screws like these come with nuts, or do I need a tapped hole?
Nuts are not included. A machine screw has a blunt end and uniform machine thread, so it needs either a pre-tapped hole or a matching 5/16-18 nut to pull against. Order the nuts separately if the material you're fastening into isn't already tapped.
9) How much does a jar of these 5/16 round head machine screws weigh for shipping?
The jar of 100 weighs 3.58 lbs, with the container measuring 3.5 by 3.5 by 5.75 inches. Useful if you're batching several jars onto a job order.
How fast can I get the Metallics JRM38SLT 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 JRM38SLT come with a warranty?
Absolutely. The Metallics JRM38SLT 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 JRM38SLT?
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 JRM38SLT from ZenSupply?
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