Metallics JFM99SS 1/4-20 x 1/2...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$192.86
Metallics JFM99SS 1/4-20 x 1/2 in. Flat Head Slotted Machine Screws - 18-8 Stainless - 100qty

Metallics JFM99SS 1/4-20 x 1/2 in. Flat Head Slotted Machine Screws - 18-8 Stainless - Each

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Model: JFM99SS
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$192.86
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1/4-20 x 1/2 in. Flat Head Slotted Machine Screws - 18-8 Stainless - 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

    • Stainless is also superior to steel in withstanding some elevation in application operating temperature while maintaining its strength.
    • Stainless steel machine screws are used in applications which require general atmospheric corrosion resistance, in food processing machinery and refrigeration equipment.
    • Flat head with slotted Drive
    • 18-8 Stainless Material
    • 1/4-20 Diameter, 1/2" Length

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
N
Buy American Compliant:
No
Dimensional Standard:
ASME B18.6.3-1998
Division:
Electrical H1
Drive Type:
Slotted
Fastener Head Height:
0.131 - 0.153 in.
Fastener Head Type:
Flat
Fastener Head Width:
0.442 - 0.477 in.
Fastener Length:
2-Jan
Field Application:
Electrical, Plumbing, Heating and Air Conditioning Industries
Hardness:
Rockwell B85-B95
Language Code:
EN
Material Standard:
SAE
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:
JR
Pack Type:
Jar
Product Group:
Fasteners
Product Height:
2.15 in
Product Length:
3 in
Product Weight:
0.81 lbs
Product Width:
3 in
Slot Depth:
0.046 - 0.07
Slot Width:
0.064 - 0.075
Sub Division:
Electrical-E H2
Tensile Strength:
1900 lb minimum
Thread Per Inch:
20
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 Details:
Machine Screw
Product Material:
18-8 Stainless

Metallics JFM99SS – Frequently Asked Questions

1) Will a 1/4-20 machine screw thread into a standard 1/4-20 tapped hole or nut?
Yes. The Metallics JFM99SS is a 1/4-20 UNC screw at 20 threads per inch, cut to ANSI/ASME B1.1, so it mates with any standard 1/4-20 coarse tapped hole, nut, or strut channel nut. Overall length is 1/2 inch, so your usable grip is 1/2 inch minus the thickness of whatever the flat head is countersunk into.
2) Can I use these on a federally funded job with Buy American requirements?
No. The JFM99SS is listed as not Buy American compliant and not ARRA compliant, with country of origin recorded as multiple. If your contract carries a domestic-sourcing clause, you need a domestically produced fastener instead.
3) Is 18-8 stainless the right choice for damp or wash-down locations?
18-8 stainless is specified for general atmospheric corrosion resistance, and it is the material used in food processing machinery and refrigeration equipment, so damp interiors, kitchens, and cooler rooms are where it earns its keep. It also holds strength better than plain steel as application temperature climbs. For buried or chloride-heavy marine exposure, 18-8 is not the top of the line in stainless grades.
4) How many screws come in a jar of JFM99SS?
They ship 100 to a jar, and the jar is the order minimum, so the smallest quantity is 100 pieces. The packed jar weighs 0.81 lbs.
5) Can I get a 1/4-20 flat head slotted stainless screw in a longer length than 1/2 inch?
The JFM99SS is the 1/4-20 x 1/2 in. size within the Metallics FM and FMP machine screw series, and other sizes and quantities in the series are available by request. If your grip is thicker than 1/2 inch, ask for the longer length in the same series rather than stacking washers under this one.
6) Are these machine screws suitable for electrical device and panel work?
Yes, they are catalogued for the electrical, plumbing, heating and air conditioning trades, which is where 1/4-20 flat head screws typically land: enclosure covers, mounting brackets, strut hardware, and equipment panels where the head needs to sit flush in a countersunk hole. They are machine screws, so they need a tapped hole or a nut on the back side, not sheet metal alone.
How fast can I get the Metallics JFM99SS 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 JFM99SS come with a warranty?
Absolutely. The Metallics JFM99SS 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 JFM99SS?
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 JFM99SS from ZenSupply?
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