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Washers 1/4 Flat SS (Jar 100)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Field Application:
- Metal to Metal
- Fits Bolt Size:
- 4-Jan IN
- Inside Diameter:
- Sep-32 IN
- Outside Diameter:
- 8-May IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Type:
- Flat Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Length:
- 3 in
- Product Height:
- 2.15 in
- Product Material:
- Stainless Steel
- Product Weight:
- 0.39 lbs
- Product Width:
- 3 in
Metallics JSSW121 – Frequently Asked Questions
1) Will a 1/4 inch stainless flat washer fit a 1/4-20 bolt or screw?
Yes. The Metallics JSSW121 is a flat washer sized for 1/4 inch bolts and screws, so it seats under a 1/4-20 hex head, nut, or machine screw without binding. Thread pitch doesn't matter for a flat washer, only the shank diameter, so it works on 1/4-20 and 1/4-28 alike.
2) Are the Metallics JSSW121 washers stainless steel or just zinc plated?
Solid stainless steel, not plated. That matters on exterior strut runs, rooftop equipment, wet mechanical rooms, and anywhere a plated washer would rust through and streak. Pair them with stainless bolts and nuts so you aren't mixing dissimilar metals in the joint.
3) What are these 1/4 inch flat washers actually used for in an electrical install?
They're a metal-to-metal washer, so the intended use is spreading load and protecting the surface where steel meets steel: bolting strut clamps, hanging channel, mounting enclosures and panel feet, securing device plates to metal backing. For soft materials like wood or sheet gypsum you'd want a larger-OD fender washer instead, since a standard flat washer can pull through.
4) How many washers come in a jar of Metallics JSSW121?
100 washers per jar. They ship in a jar rather than a bag, which keeps the count contained in a van or on a gang box, and the full jar runs about 0.39 lbs.
5) Does this washer meet ANSI dimensional sizing for a 1/4 inch flat washer?
Yes, the JSSW121 is built to ANSI sizing for a 1/4 inch flat washer, so the hole and outside diameter match what a drawing or spec calling out an ANSI 1/4 flat washer expects. That's what lets an MRO buyer standardize on one washer across a facility instead of stocking several near-sizes.
6) Is the JSSW121 a flat washer or a lock washer?
Flat. It distributes clamping load and keeps the fastener head from digging into the mating surface, but it does nothing to resist loosening from vibration. If the connection sees vibration, add a split lock washer or a locking nut under the fastener as well.
7) What is the manufacturer part number for Metallics 1/4 inch stainless flat washers in a jar of 100?
Order Metallics part number JSSW121. One part number covers the whole item: 1/4 inch flat, stainless steel, 100-count jar.
How fast can I get the Metallics JSSW121 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 JSSW121 come with a warranty?
Absolutely. The Metallics JSSW121 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 JSSW121?
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