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USS Flat Washers
USS Flat Washers were among the first known commercial flat washers in the U.S.A. They are characterized as having a loose fit, and have a larger outside diameter than SAE Flat washers. The USS designation was derived from the name “Unified Standard Series.” At the time, coarse threaded bolts were called USS bolts.
USS Flat Washers Diameters
USS Flat Washers are available on the FCH Network with Imperial/US diameters that range from #1 to 3 1/2 and with Metric diameters that range from M2 to M42.
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USS Flat Washers Materials
USS Flat Washers are available on the FCH Network in materials that range from Steel to Nylon (Polyamide)
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USS Flat Washers Finishes
USS Flat Washers are available on the FCH Network in finishes or coatings that range from Plain to Phosphate
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- Chromate Conversion (Iridite, Alodine)
- Chrome Plated
- Copper Plated
- Dip-Spin, Spray-Spin Basecoat + Topcoats (Dacromet, Doerken, Geomet, Magni, etc.)
- Electrolytic Zinc Basecoat + Topcoats (Climacoat, Climaseal, etc.)
- Fluoropolymer-Based (Xylan, Fluorokote, Teflon)
- Nickel Plated
- Non-Electrolytic Zinc & Aluminum Flakes + Matrix
- Painted
- Phosphate