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Washers 5/16 USS Flat SS (Jar 100)
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
- 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:
- Stainless Steel
- Product Length:
- 3 in
- Product Color:
- Stainless Steel
- Product Height:
- 2.15 in
- Product Material:
- Stainless Steel
- Product Weight:
- 0.51 lbs
- Product Width:
- 3 in
- Product Depth:
- 0.104-0.064 in
Metallics JWW81SS – Frequently Asked Questions
1) Are these 5/16 washers stainless steel, and will they hold up outdoors?
Stainless steel throughout, material and finish both. That makes them suitable for damp, exterior, or washdown locations where a plated carbon steel washer would rust and bleed onto the surface. Pairing them with stainless bolts avoids mixing metals at the joint.
2) What is the difference between a USS flat washer and an SAE washer for 5/16 hardware?
USS pattern washers, like the JWW81SS, have a larger outside diameter and a wider bearing surface than SAE pattern washers of the same bolt size. That extra footprint is what spreads clamp load over soft or oversized material, which is why USS washers are used to improve stress distribution. If you are seating against a machined surface or working in a tight counterbore, the narrower SAE pattern is the better pick.
3) How thick is the Metallics JWW81SS washer?
Washer thickness runs 0.064 to 0.104 inch. That range matters when you are stacking washers under a strut nut or checking that enough bolt thread still engages after the washer takes up grip length.
4) How many washers come in a jar of Metallics JWW81SS?
They ship 100 to a jar, packaged as a jar rather than a loose bag, which keeps them contained on a cart or in a van bin. The jar weighs 0.51 lbs.
5) Can I use these washers on strut, hangers, and electrical support hardware?
Yes. The JWW81SS is a general purpose 5/16 USS flat washer catalogued for electrical work, so it suits strut hardware, threaded rod hangers, panel and enclosure mounting, and anywhere a 5/16 fastener bears on sheet metal or a slotted hole. The wide USS bearing face is the reason it works over slots, where a small washer would pull through.
6) Do these washers meet a dimensional standard for 5/16 USS flat washers?
They are built to the ANSI dimensional pattern for USS flat washers, with the bore held at 0.370 to 0.390 inch and thickness at 0.064 to 0.104 inch. If your spec calls out a USS pattern washer for 5/16 hardware, those numbers are what to check against.
How fast can I get the Metallics JWW81SS 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 JWW81SS come with a warranty?
Absolutely. The Metallics JWW81SS 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 JWW81SS?
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product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Metallics JWW81SS from ZenSupply?
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and
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