Metallics JRM122SLT 5/16-18 x ...
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Metallics JRM122SLT 5/16-18 x 2-1/2 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

Metallics JRM122SLT 5/16-18 x 2-1/2 in. Round Head Slotted Machine Screws - Steel Zinc - Each

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Model: JRM122SLT
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$50.67
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5/16-18 x 2-1/2 in. Round Head Slotted Machine Screws - Steel Zinc - 100qty

  • Features

    • Round head with slotted Drive
    • 5/16-18 Diameter, 2-1/2" Length
    • Steel Zinc Material

  • 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:
2/1/02
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:
7.25 in
Product Length:
4.5 in
Product Weight:
5.15 lbs
Product Width:
4.5 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 JRM122SLT – Frequently Asked Questions

1) What thread does the Metallics JRM122SLT machine screw use, and will it take a standard 5/16-18 nut?
It's a 5/16-18 thread, 18 threads per inch, which is the standard UNC coarse pitch for 5/16 inch diameter. Any standard 5/16-18 nut or tapped 5/16-18 hole will accept it. Length is 2-1/2 inches.
2) How much does the round head sit above the surface on this 5/16-18 slotted screw?
The round head measures 0.198 to 0.216 inches in height and 0.557 to 0.59 inches across. That head stands proud of the surface by design, so if you need the fastener flush in a countersunk hole, a round head is the wrong choice - go to a flat head instead.
3) Is this screw strong enough for mounting electrical enclosures and bracket work?
Tensile strength is 60,000 psi minimum with a hardness of Rockwell B70-B100, made from AISI 1006-1022 low carbon steel. That's standard commercial machine screw strength, fine for enclosure mounting, panel and bracket work. It is not a graded structural bolt, so don't substitute it where a drawing calls out a Grade 5 or Grade 8 fastener.
4) Do these screws meet Buy American or ARRA requirements on a public project?
Metallics lists the JRM122SLT as ARRA compliant and Buy American compliant. Country of origin is China. On federal or state work where the spec draws a hard domestic-melt-and-manufacture line rather than an ARRA compliance flag, get the compliance basis confirmed against your contract language before you submit it.
5) Will zinc plated steel machine screws hold up outdoors or in a damp location?
The JRM122SLT is zinc plated carbon steel, which handles dry indoor and protected locations well. Zinc plating is a sacrificial coating, not a sealed one, so sustained wet exposure, washdown areas or coastal air will eventually bloom white rust and then red. For those spots specify a stainless machine screw in the same 5/16-18 x 2-1/2 size instead.
6) How do these Metallics machine screws ship, and is there a minimum order?
They come in a jar of 100 count, and 100 is the order minimum. Total shipping weight is 5.15 lbs for the jar. Metallics notes other sizes and quantities are available by request.
7) What's the difference between a machine screw like this and a sheet metal or self-tapping screw?
A machine screw has a uniform straight 5/16-18 machine thread and no point - it needs a pre-tapped hole or a mating nut. Self-tapping and sheet metal screws cut their own thread in an untapped pilot. At 2-1/2 inches with a round slotted head, the JRM122SLT is meant for through-bolting with a nut or threading into tapped stock in enclosure, panel and device work.
8) Does the JRM122SLT come with nuts or washers?
No. It's the screw only, 100 per jar, 5/16-18 x 2-1/2 inches in zinc plated steel. Order 5/16-18 nuts and 5/16 flat or lock washers separately if the assembly needs them.
How fast can I get the Metallics JRM122SLT 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 JRM122SLT come with a warranty?
Absolutely. The Metallics JRM122SLT 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 JRM122SLT?
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 JRM122SLT from ZenSupply?
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