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Washers M4 Split Lock St-zn (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Field Application:
- Electrical, Plumbing, Heating and Air Conditioning Industries
- Fits Bolt Size:
- M4 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Metric Lock Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Zinc
- Product Length:
- 3 in
- Product Height:
- 2.15 in
- Product Material:
- Steel
- Product Weight:
- 0.093 lbs
- Product Width:
- 3 in
Metallics JMLW04 – Frequently Asked Questions
1) Are these M4 lock washers plated for corrosion resistance?
They're steel with a zinc finish. Zinc plating handles indoor panel work, damp mechanical rooms and general interior electrical boxes. For sustained outdoor exposure or washdown, step up to stainless.
2) How many washers come in a jar of Metallics JMLW04?
100 washers per jar. The jar pack is the ordering unit, which keeps M4 hardware sorted on a service van or at a bench instead of loose in a bag.
3) What is a split lock washer actually doing under the nut?
A split lock washer is a single coil with offset ends. Tightening flattens the coil so it pushes back against the nut and the sharp cut ends bite into the nut face and the joint surface, resisting loosening from vibration. On M4 hardware in panels, enclosures and equipment mounting, that's what keeps small screws from backing out.
4) Can I use these M4 lock washers on plumbing and HVAC equipment, or are they electrical only?
They're intended across the electrical, plumbing, heating and air conditioning trades, so M4 equipment mounting on a condensing unit, a pump bracket or a control panel are all in scope. One box of fasteners covers more than one trade's work.
5) Will the Metallics JMLW04 work with a flat washer under it?
Yes, and that's common practice on soft or painted surfaces: flat washer against the material to spread the load, split lock washer between the flat washer and the nut. Just keep both at M4 so the bore matches the fastener.
6) How much does a jar of 100 M4 split lock washers weigh for shipping or kitting?
The jar is listed at 0.093 lbs, with the container measuring 3 x 3 x 2.15 inches. Light enough to drop several sizes into one truck stock bin without a weight concern.
How fast can I get the Metallics JMLW04 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 JMLW04 come with a warranty?
Absolutely. The Metallics JMLW04 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 JMLW04?
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 JMLW04 from ZenSupply?
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and
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