Metallics JFM73 4-40 x 1-1/2 i...
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Metallics JFM73 4-40 x 1-1/2 in. Flat Head Slotted Machine Screws - Steel Zinc - 100qty

Metallics JFM73 4-40 x 1-1/2 in. Flat Head Slotted Machine Screws - Steel Zinc - Each

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Model: JFM73
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4-40 x 1-1/2 in. Flat Head Slotted Machine Screws - Steel Zinc - 100qty

  • Features

    • Steel Zinc Material
    • Flat head with slotted Drive
    • 4-40 Diameter, 1-1/2" Length
    • Zinc yellow screws are popular in electronics applications.

  • 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.

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:
0.055 - 0.067 in.
Fastener Head Type:
Flat
Fastener Head Width:
0.191 - 0.212 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-Flat_Head_Mach_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:
0.27 lbs
Product Width:
3 in
Slot Depth:
0.02 - 0.03
Slot Width:
0.031 - 0.039
Sub Division:
Electrical-E H2
Tensile Strength:
360 lb minimum
Thread Per Inch:
40
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 JFM73 – Frequently Asked Questions

1) What thread does the Metallics JFM73 machine screw use, and will it fit a 4-40 tapped hole?
JFM73 is a 4-40 UNC screw, 40 threads per inch, cut to ANSI/ASME B1.1. It threads into any standard 4-40 tapped hole or 4-40 nut, which is the common size for device plates, small enclosures, and electronics chassis work. Length is 1-1/2 inches, so you need that much depth plus clearance behind the part you are fastening.
2) Will a flat head 4-40 screw sit flush in a countersunk hole?
Yes, that is what the flat head is for. The head on the JFM73 measures 0.191 to 0.212 inch across and 0.055 to 0.067 inch high, built to ASME B18.6.3-1998, so it seats flush in a standard 82-degree countersink for a #4 screw. If your hole is not countersunk, the head will stand proud and you want a pan or round head instead.
3) Are these zinc machine screws OK outdoors or in a damp location?
These are carbon steel with a zinc plating, not stainless. Zinc plating handles indoor and dry environments fine, which is where most panel, enclosure, and electronics work happens. For wet, washdown, coastal, or chemical exposure, specify a stainless 4-40 flat head slotted screw instead; the plating will eventually give up and the steel underneath will rust.
4) Can I use a machine screw like this to mount a device into a steel outlet box?
Not this one. Standard outlet box device and cover screws are 6-32, and 4-40 will not catch those threads. The JFM73 is the smaller 4-40 UNC size used for electronics enclosures, small terminal blocks, and panel components. For box and device mounting, order 6-32 machine screws instead.
5) Is the Metallics JFM73 sold individually or by the box?
It ships as a jar of 100, and 100 count is the order minimum. Plan quantities in multiples of 100 rather than piece counts.
6) How much load will a 4-40 steel zinc machine screw hold?
Rated at 360 lb minimum tensile, with a hardness of Rockwell B70 to B100 on AISI 1006 to 1022 steel. That is a light-duty fastener by design, right for securing covers, plates, brackets, and devices. It is not a structural fastener and should not be relied on for load-bearing or safety-critical attachment.
7) Do these screws qualify for a Buy American or ARRA-funded project?
The JFM73 is flagged ARRA compliant and Buy American compliant in Metallics' data, with country of origin listed as China. On federally funded work, submit those compliance flags to your specifier and let them confirm against the specific funding clause on your project, since the applicable rule differs between ARRA, BAA, and BABA jobs.
How fast can I get the Metallics JFM73 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 JFM73 come with a warranty?
Absolutely. The Metallics JFM73 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 JFM73?
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 JFM73 from ZenSupply?
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