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Washers 3/8 USS Flat St-zn (Box 3350)
Manufacturer Resources
Product Specs
- Ansi:
- ANSI
- Country Of Origin:
- MUL
- Division:
- Electrical H1
- Pack Type:
- Box
- Product Family:
- Electrical Supplies
- Product Group:
- Fasteners
- Sub Division:
- Electrical-E H2
- Department:
- Electrical
- Product Subgroup:
- Washers
- Product Length:
- 9 in
- Product Height:
- 6.13 in
- Product Material:
- Steel Zinc
- Product Weight:
- 51.56 lbs
- Product Width:
- 9 in
Metallics WW82B – Frequently Asked Questions
1) What bolt size do Metallics WW82B flat washers fit?
The WW82B is a 3/8 inch USS flat washer, so it seats under a 3/8 inch bolt, machine screw, or threaded rod. USS pattern means a larger outside diameter and bigger hole than the SAE pattern in the same nominal size, which is what you want for spreading load on wood, sheet steel, or slotted strut where an SAE washer would pull through.
2) How many washers come in a box of Metallics WW82B?
3,350 pieces per box, sold as a bulk box rather than a small count card. That is a stockroom or job-trailer quantity for an electrical contractor running strut and rod, not a repair pack.
3) Can I use a 3/8 USS flat washer with a 3/8 threaded rod hanger for conduit and strut?
Yes. The WW82B is a 3/8 inch flat washer, so it drops over 3/8-16 all-thread and sits under the nut on strut channel nuts, pipe hangers, and beam clamps. Because it is the USS pattern, the hole is a bit looser on the rod than SAE and the bearing face is wider, which is what you want against channel slots and sheet metal.
4) Are the WW82B washers plated or bare steel?
Steel with zinc plating. That gives ordinary indoor and dry-location corrosion protection for conduit strapping, panel mounting, and strut work. For wet, exterior, or corrosive locations, spec hot-dip galvanized or stainless instead, since zinc electroplate is a thin coating.
5) What is the difference between a USS flat washer and an SAE flat washer in 3/8?
Same bolt size, different proportions. A USS washer like the WW82B has a larger outside diameter and a slightly oversized hole, spreading clamp load over more area. SAE washers are tighter to the bolt and smaller overall, which suits machined surfaces and counterbores where a wide washer would not sit flat. If the print calls for SAE, a USS washer is not a drop-in substitute.
6) How much does a box of 3/8 USS flat washers weigh for shipping and shelf planning?
The full box of WW82B washers runs 51.56 lbs, measuring 9 x 9 x 6.13 inches. Plan on a two-hand lift and a shelf rated for it if you are stocking several boxes on a MRO rack.
7) Is the Metallics WW82B washer an imported part, and does that matter for a Buy American job?
Country of origin is listed as multiple, meaning the washers may ship from more than one source country. On federally funded or Buy American Act work that specifies domestic fasteners, this part will not satisfy that requirement and you should spec a domestically sourced washer instead.
8) Will a 3/8 USS flat washer work under a lock washer and nut on a ground bus or panel bolt?
Yes, and that is the normal stack order: flat washer against the material, split lock washer, then the nut. The WW82B is zinc-plated steel, so keep it to indoor panel, enclosure, and strut work. For bonding at outdoor or damp locations, use a corrosion-matched washer to avoid galvanic issues with copper lugs.
How fast can I get the Metallics WW82B 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 WW82B come with a warranty?
Absolutely. The Metallics WW82B 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 WW82B?
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