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Washers 3/8 USS Flat Pln-St (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 Material:
- Plain Steel
Metallics JWW82PL – Frequently Asked Questions
1) Will a 3/8 USS flat washer work with 3/8-16 bolts and 3/8 all-thread rod?
The Metallics JWW82PL is a 3/8 inch USS flat washer, so it drops over any 3/8 inch bolt, hex head screw, or all-thread rod. USS pattern means a larger outside diameter and a slightly oversized hole compared with the SAE pattern, which is what you want for strut, channel, and wood framing where the load needs spreading. If you are bolting into a tight counterbore or a small flange, the SAE 3/8 washer is the one to ask for instead.
2) Are the Metallics JWW82PL washers plated or bare steel?
Bare. These are plain steel, with no zinc or galvanized coating, so they will rust if exposed to weather or damp. Keep them to dry interior work: indoor strut runs, panel and enclosure mounting, equipment anchoring inside conditioned space. For outdoor, rooftop, or wash-down locations, specify a zinc-plated or hot-dip galvanized 3/8 USS washer instead.
3) How many washers come in the Metallics JWW82PL jar?
One hundred 3/8 USS plain steel flat washers in a jar. The jar pack is handy for a service van or a shop bin since it reseals and stays labeled, but if you are consuming washers by the thousand on a single job, ask for a bulk box rather than ordering jars in quantity.
4) Do I need a flat washer and a lock washer, or is the flat washer enough?
They do different jobs. The 3/8 USS flat washer spreads the clamp load and protects the surface under the nut or bolt head. It does not resist loosening. On vibrating equipment, motors, or anything mounted to metal framing that moves, stack the flat washer against the material and put a split lock washer or a locking nut against the nut. Order the lock washers separately; they are not included with the JWW82PL jar.
5) Are these washers made to a dimensional standard?
Yes, the 3/8 USS flat washers are made to the ANSI dimensional standard, which fixes the outside diameter, hole size, and thickness for the USS pattern. That matters when you are matching washers already on a job or satisfying a spec that calls out a standard washer rather than a fender or oversized one.
6) Can I use these flat washers instead of a fender washer for mounting into drywall or thin sheet metal?
No. A 3/8 USS flat washer is only modestly larger than the bolt, so it will pull through drywall or thin sheet and it is not a bearing surface for soft material. For those, use a fender washer or a backing plate. The USS flat washer is for bolting to strut, steel, concrete anchors, and framing where the substrate carries the load.
How fast can I get the Metallics JWW82PL 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 JWW82PL come with a warranty?
Absolutely. The Metallics JWW82PL 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 JWW82PL?
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