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Washers 5/16 USS Flat St-zn (Jar 1000)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Division:
- Electrical H1
- Field Application:
- USS Washers used to improve stress distribution.
- Fits Bolt Size:
- 16-May IN
- Inside Diameter:
- 0.390-0.370 IN
- Outside Diameter:
- 0.905-0.868 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Washer Thickness:
- 0.104-0.064 IN
- Washer Type:
- USS Flat Washer
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Finish:
- Zinc Chromate
- Product Length:
- 4.5 in
- Product Color:
- Silver
- Product Height:
- 7.25 in
- Product Material:
- Steel Zinc
- Product Weight:
- 11.95 lbs
- Product Width:
- 4.5 in
- Product Depth:
- 0.104-0.064 in
Metallics JWW81M – Frequently Asked Questions
1) Are these 5/16 washers zinc plated for indoor electrical work?
The JWW81M is steel with a zinc finish, specifically zinc chromate, and reads silver. That is a standard indoor and protected-location plating for strut, panel, and conduit support hardware. For continuous wet exposure or washdown, specify stainless instead.
2) How many 5/16 washers come in the Metallics JWW81M jar?
It ships as a jar of 1,000 pieces, weighing 11.95 lbs. The jar format is aimed at MRO cribs and service trucks where you want a resealable bulk container on the shelf rather than a loose box.
3) How thick is the Metallics JWW81M washer?
Thickness runs 0.064 to 0.104 inch. Worth checking against your grip length: on short bolts that extra tenth of an inch per washer can leave you short of full thread engagement on the nut, so size bolt length with the washer stack included.
4) Does the JWW81M washer follow a recognized dimensional standard?
It is built to the ANSI standard as a USS pattern flat washer, which is why the inside and outside diameters fall in defined ranges (0.370 to 0.390 inch ID, 0.868 to 0.905 inch OD) rather than a single nominal number. For facilities standardizing a fastener bill of materials, that means jars bought at different times interchange.
How fast can I get the Metallics JWW81M 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 JWW81M come with a warranty?
Absolutely. The Metallics JWW81M 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 JWW81M?
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product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics JWW81M from ZenSupply?
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and
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every order.
Our team is always ready to help you choose the right product for your project.