Metallics JFM71 5/16-18 x 1-1/...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$192.86
Metallics JFM71 5/16-18 x 1-1/4 in. Flat Head Slotted Machine Screws - Steel Zinc - 100qty

Metallics JFM71 5/16-18 x 1-1/4 in. Flat Head Slotted Machine Screws - Steel Zinc - Each

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Model: JFM71
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$192.86
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5/16-18 x 1-1/4 in. Flat Head Slotted Machine Screws - Steel Zinc - 100qty

  • Additional Notes

    • Other sizes and quantities available by request | Hardness and tensile strength standards are offered as guides only for stainless machine screws. There is currently no national standard for these performance requirements for stainless machine screws.

  • Features

    • 5/16-18 Diameter, 1-1/4" Length
    • Steel Zinc Material
    • Flat head with slotted Drive
    • Zinc yellow screws are popular in electronics applications.

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
C
Buy American Compliant:
C
Dimensional Standard:
ASME B18.6.3-1998
Division:
Electrical H1
Drive Type:
Slotted
Fastener Head Height:
0.165 - 0.191 in.
Fastener Head Type:
Flat
Fastener Head Width:
0.556 - 0.597 in.
Fastener Length:
1/1/04
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-Flat_Head_Mach_Screw.pdf
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
CT
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
3.6 in
Product Length:
3 in
Product Weight:
2.46 lbs
Product Width:
3 in
Slot Depth:
0.058 - 0.088
Slot Width:
0.072 - 0.084
Sub Division:
Electrical-E H2
Tensile Strength:
3150 lb minimum
Thread Per Inch:
18
Thread Standard:
ANSI/ASME B1.1
Thread Type:
UNC
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Machine Screw
Type2:
Machine Screw
Series:
FM and FMP
Product Finish:
Zinc
Product Details:
Machine Screw
Product Material:
Steel Zinc

Metallics JFM71 – Frequently Asked Questions

1) Will a 5/16-18 machine screw thread into a standard 5/16 coarse tapped hole or nut?
Yes. The Metallics JFM71 is a 5/16-18 UNC screw with 18 threads per inch, made to ANSI/ASME B1.1, so it mates with any standard 5/16-18 coarse tapped hole, nut, or strut channel nut. If the hole in your box or fitting is 5/16-24 fine thread, this is not the screw for it.
2) Does the flat head on the JFM71 sit flush, and what countersink does it need?
It is a flat countersunk head, so it finishes flush with the surface when the hole is countersunk at 82 degrees. Head width runs 0.556 to 0.597 in. and head height 0.165 to 0.191 in., which is what you size the countersink to. On sheet metal too thin to countersink, the head will stand proud, so a pan or round head is the better pick there.
3) Is zinc plated steel good enough outdoors or in a damp location?
The JFM71 is steel with a zinc finish, which is a mild corrosion coating meant for dry interior and protected use. In wet, exterior, coastal or washdown areas the plating gives out and the screw rusts. Specify stainless in those spots.
4) Do these machine screws meet Buy American or ARRA requirements for a government job?
The JFM71 is flagged as both ARRA compliant and Buy American compliant in the manufacturer data, with country of origin China. For a federally funded project where the specification is domestic-origin material rather than the ARRA/Buy American product classification, confirm which rule your spec is written to before submitting.
5) Will a 5/16-18 x 1-1/4 in. flat head screw meet a spec that calls out ASME B18.6.3?
Yes. The head, slot and body dimensions on the JFM71 are built to ASME B18.6.3-1998, the dimensional standard for inch-series slotted and recessed head machine screws, with threads to ANSI/ASME B1.1. That is the pair of callouts most submittals for machine screws reference.
6) How are these 5/16-18 flat head machine screws packaged and what is the minimum order?
They come in a jar, with a minimum order of 100 count. That is a shop or truck-stock quantity rather than a loose single screw, so if you need a handful for one device plate you will still be buying the jar.
7) Is the hardness and tensile rating on these the same if I switch to stainless machine screws?
No, and Metallics says so directly: hardness and tensile figures for stainless machine screws are guides only, because there is no national standard for those performance requirements on stainless machine screws. The 3150 lb minimum tensile and Rockwell B70-B100 apply to this zinc plated steel version. If your spec demands a documented strength value, stay with steel.
How fast can I get the Metallics JFM71 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 JFM71 come with a warranty?
Absolutely. The Metallics JFM71 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 JFM71?
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 JFM71 from ZenSupply?
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