Metallics JMSHC420SS M4 x 20mm...
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Metallics JMSHC420SS M4 x 20mm Metric Cap Head Hex Cap Screws - 18-8 Stainless - Each

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Model: JMSHC420SS

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

$50.40
$0.40
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M4 x 20mm Metric Cap Head Hex Cap Screws - 18-8 Stainless - 100qty

  • Features

    • They retain thier mechanical ard performance capabilities at higher than ambient temperatures.
    • 18-8 Stainless Material
    • Socket head with Hex Drive
    • Metric Class 12.9 socket cap screws are usually supplied with a plain, black finish
    • M4 Diameter, 20mm" Length

  • Additional Notes

    • METRIC | Other sizes and quantities available by request

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
C
Buy American Compliant:
C
Dimensional Standard:
ISO 4742
Division:
Electrical H1
Drive Type:
Hex
Fastener Head Height:
3.82 - 4 in.
Fastener Head Type:
Socket
Fastener Head Width:
6.78 - 7.22 in.
Fastener Length:
20mm
Grade:
12.9
Hardness:
Rockwell C39-44
Language Code:
EN
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Socket_Head_Cap_Screw_Metric.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:
0.6 lbs
Product Width:
3 in
Slot Depth:
2
Socket Size Across Corners:
3.44
Socket Size Across Flats:
3.020 - 3.071
Sub Division:
Electrical-E H2
Tensile Strength:
1220 N/mm2 minimum
Thread Pitch:
0.7
Wall Thickness:
1.4
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Cap Screw
Type2:
Cap Screw
Series:
MSHC
Product Details:
Cap Screw
Product Material:
18-8 Stainless

Metallics JMSHC420SS – Frequently Asked Questions

1) What size hex key do I need for the Metallics JMSHC420SS M4 socket cap screw?
A 3 mm hex key. The socket on the JMSHC420SS measures 3.020 to 3.071 across the flats, which is the standard 3 mm drive socket for an M4 socket head cap screw. It is a socket head with a hex drive, so you drive it with an Allen key or hex bit, not a screwdriver.
2) How deep a hole do I need for a 20mm M4 cap screw?
The threaded length to plan around is 20 mm, so a blind tapped hole needs that much usable thread plus a little relief at the bottom once you subtract whatever material thickness the screw passes through first. Through-bolting into a nut, measure your stack: anything over roughly 20 mm total grip leaves no thread for the nut, and you'd move up to a longer length in the same MSHC series.
3) Are these M4 cap screws stainless, and will they hold up outdoors or in a damp enclosure?
They are 18-8 stainless, the common austenitic grade used where plated carbon steel would rust. That makes the JMSHC420SS a reasonable pick for damp interiors, exterior enclosures, and washdown areas, and it won't leave rust streaks on an aluminum or stainless enclosure the way a zinc-plated screw eventually does.
4) How are these Metallics M4 x 20mm cap screws packaged, and is there a minimum order?
They ship in a jar of 100, and 100 count is the minimum order. So you are buying a shop quantity, not a handful, which is how most MRO and panel-build buyers want fasteners stocked.
5) What dimensional standard do these metric socket head cap screws follow?
The JMSHC420SS is built to ISO 4742 dimensions. If your drawing calls out a metric socket head cap screw to an ISO dimensional standard, the head and socket geometry are to that spec rather than to an inch (ASME) pattern, which matters when the part has a counterbored pocket sized for a metric head.
6) Are these screws Buy American or ARRA compliant for a government job?
Both the ARRA and Buy American flags on the JMSHC420SS are marked compliant, while the country of origin is listed as China. On federally funded work, confirm which of the two standards your contract actually invokes, since they treat origin differently.
7) Is a socket head cap screw the right choice over a hex head bolt for mounting equipment in a panel?
Use the socket head when the fastener sits in a counterbore or in tight quarters where a wrench cannot swing, which is typical inside electrical enclosures and on machined brackets. The JMSHC420SS drives with a hex key straight down the axis, so you only need clearance above the head, not around it. If you need to put a torque wrench and socket on it with open access, an external hex head is easier to run.
8) Can I get this Metallics socket cap screw in other metric sizes or lengths?
Yes. The MSHC line runs other metric diameters and lengths beyond M4 x 20mm, and other quantities are available by request, so you can standardize a panel or fixture on one head style across several screw lengths.
How fast can I get the Metallics JMSHC420SS 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 JMSHC420SS come with a warranty?
Absolutely. The Metallics JMSHC420SS 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 JMSHC420SS?
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 JMSHC420SS from ZenSupply?
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