You may also like
Washers M20 Flat SS (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Length:
- 3.5 in
- Product Height:
- 5.75 in
- Product Material:
- Stainless Steel
- Product Weight:
- 3.48 lbs
- Product Width:
- 3.5 in
Metallics JMSW020SS – Frequently Asked Questions
1) What size bolt does the Metallics JMSW020SS flat washer fit?
It's an M20 flat washer, so it's sized for M20 metric bolts and threaded rod. It will not suit inch-series hardware except where an M20 happens to be close to 3/4 inch; if your anchors are imperial, order a 3/4 inch flat washer instead.
2) Are these Metallics M20 washers stainless steel or plated?
Stainless steel, not plated carbon steel. That matters if you're mounting strut, conduit supports, or enclosures outdoors or in a wet or washdown area, where a zinc-plated washer would bleed rust. Pair them with stainless bolts and nuts to avoid mixing metals in the joint.
3) How many washers come in a jar of Metallics JMSW020SS?
100 M20 flat stainless washers per jar, packed in a jar rather than a loose bag, so it stays sorted on the van or the shop shelf. The jar is a single purchase unit, so order quantity 1 to get 100 pieces.
4) Is a flat washer the right choice here, or should I use a lock washer?
A flat washer like the JMSW020SS spreads the clamp load over a wider area and protects the surface under the nut or bolt head, which is what you want on sheet metal, strut, or soft material. It does nothing to resist loosening from vibration. On equipment that vibrates, use a flat washer against the material and add a split lock washer or a locking nut under the nut.
5) Can I use these M20 washers on outdoor electrical equipment mounts?
Yes. Stainless construction means they hold up on exterior conduit racks, rooftop equipment supports, and other damp locations where plated steel washers corrode. They're stocked as an electrical fastener item, so they're meant for that kind of mounting work rather than structural steel connections.
6) What is the part number and weight of the Metallics M20 stainless flat washer jar?
Manufacturer part number JMSW020SS from Metallics. The filled jar weighs 3.48 lbs and measures 3.5 x 3.5 x 5.75 inches, which is useful if you're building out a stocking list or figuring shelf space in a parts room.
How fast can I get the Metallics JMSW020SS 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 JMSW020SS come with a warranty?
Absolutely. The Metallics JMSW020SS 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 JMSW020SS?
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 JMSW020SS 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.