USS Washer Material

Imperial

Black Steel Low Strength Grade 5	Zinc Plated Low Strength Grade 5	Galvanized Low Strength Grade 2	Brass
Yellow Zinc Plated Medium Strength Grade 8	Cadium Plated High Strength Grade 9	Black-Oxide Stainless Steel	304 Stainless Steel
316 Stainless Steel

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Metric

Zinc Plated Low Strength Grade 8.8	Yellow Zinc Plated Medium Strength Grade 10.9	Copper	A2 Stainless Steel
A4 Stainless Steel