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Washers M4 Split Lock SS (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Lock Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Length:
- 3 in
- Product Height:
- 2.15 in
- Product Material:
- Stainless Steel
- Product Weight:
- 0.24 lbs
- Product Width:
- 3 in
Metallics JMLW04SS – Frequently Asked Questions
1) What size bolt or screw does the Metallics JMLW04SS split lock washer fit?
The JMLW04SS is an M4 split lock washer, so it goes under the nut or screw head on M4 metric threaded fasteners. It will not hold properly on M3 or M5 hardware, and it is not a substitute for a #8 or 1/4-20 inch-series washer on imperial threaded fasteners.
2) Are these M4 lock washers stainless steel, and can they be used outdoors or in damp locations?
They're stainless steel, which is the material you want for exterior enclosures, wet locations, washdown areas, and coastal jobs where plated carbon steel washers rust and seize. Stainless also avoids galvanic trouble when you're pairing them with stainless M4 screws and nuts.
3) What does a split lock washer do that a flat washer doesn't?
A split lock washer is a single coil with a gap, and the sprung ends bite into the nut and the mating surface to resist the fastener backing off under vibration. A flat washer only spreads load and does nothing about loosening. If you're mounting a device or terminal that sees vibration, use the split lock washer; if you're protecting a soft or oversized-hole surface, you want a flat washer, often both together with the flat washer against the material.
4) Are these M4 washers suitable for electrical panel and enclosure hardware?
Yes. Metallics catalogs the JMLW04SS as electrical-supply fastener stock, and M4 stainless split lock washers are the normal choice for securing small machine screws on enclosure doors, DIN rail, ground bars, and device mounting inside panels.
5) Where are Metallics JMLW04SS stainless lock washers made?
Country of origin is China. That matters for public and institutional procurement where domestic-sourcing clauses apply, so confirm against your contract requirements before specifying them on a government job.
How fast can I get the Metallics JMLW04SS 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 JMLW04SS come with a warranty?
Absolutely. The Metallics JMLW04SS 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 JMLW04SS?
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 JMLW04SS from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.