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Washers M20 Flat 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:
- M20 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Metric Flat Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Zinc
- Product Length:
- 3.5 in
- Product Height:
- 5.75 in
- Product Material:
- Steel
- Product Weight:
- 1.58 lbs
- Product Width:
- 3.5 in
Metallics JMSW020 – Frequently Asked Questions
1) What bolt size do the Metallics JMSW020 flat washers fit?
The JMSW020 is a metric flat washer sized for M20 bolts and threaded rod. If you are working in imperial hardware, M20 is a metric diameter and will not seat correctly on a 3/4 inch bolt, so match it to metric fasteners only.
2) Are these M20 washers zinc plated for damp or outdoor use?
Steel with a zinc finish. Zinc plating handles general indoor and sheltered conditions, but it is not stainless, so continuously wet, coastal, or chemically aggressive locations will corrode it over time. For dry mechanical rooms, strut runs, and panel mounting it is the usual choice.
3) How many washers come in a jar of Metallics JMSW020?
Each jar holds 100 M20 flat washers. The jar is the pack type, which is handy for a service van or a shop bin rather than loose bagged counts.
4) Is the Metallics JMSW020 a flat washer or a lock washer?
Flat washer, not a lock washer. It distributes clamping load and protects the surface under the nut; it does not resist loosening from vibration. If you need vibration resistance on an M20 fastener, pair it with a split lock washer or a locking nut.
5) What does a jar of 100 M20 flat washers weigh and how much shelf space does it take?
A full jar runs 1.58 lbs and measures 3.5 x 3.5 x 5.75 inches, so it stacks easily on a van shelf or in a parts drawer alongside other fastener jars.
6) Can I use these flat washers on plumbing and HVAC hangers, or are they electrical only?
The JMSW020 is catalogued for electrical, plumbing, heating and air conditioning work, so it is the same washer across trades. Typical use is spreading load under a nut or bolt head on strut, hanger rod, and equipment mounting.
How fast can I get the Metallics JMSW020 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 JMSW020 come with a warranty?
Absolutely. The Metallics JMSW020 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 JMSW020?
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
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