Metric Stainless Steel Washers - Corrosion-Resistant Metric Flat Washers

Metric stainless steel washers provide exceptional corrosion resistance and strength for metric fastener assemblies in marine, food processing, chemical, and outdoor environments. Superior Washer & Gasket Corp manufactures metric stainless steel flat washers in 304, 316, and other grades to DIN and ISO standards, with custom metric sizes available.

Our ISO 9001:2015 certified facility supplies metric stainless steel washers from stock inventory and produces custom metric stainless washers for specialized applications. All stainless steel washers are made in the U.S.A. with full material certifications available.

Metric stainless steel washers in 304 and 316 grades
DIN and ISO standard sizes in stock
Custom metric stainless steel flat washers to specification
ISO 9001:2015 certified quality assurance
Made in the U.S.A.

Showing 251–300 of 4,971 products

SKU	ID (MM)	OD (MM)	Thickness (MM)	Material	ID MM TOL	OD MM TOL	Quantity
630-2370	ID (MM) 3.023	OD (MM) 9.677	Thickness (MM) 2.159	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2371	ID (MM) 3.023	OD (MM) 10.312	Thickness (MM) 0.787	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2372	ID (MM) 3.023	OD (MM) 12.751	Thickness (MM) 0.61	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2373	ID (MM) 3.048	OD (MM) 4.724	Thickness (MM) 0.457	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2374	ID (MM) 3.048	OD (MM) 7.01	Thickness (MM) 0.61	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2375	ID (MM) 3.048	OD (MM) 9.474	Thickness (MM) 0.406	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2376	ID (MM) 3.048	OD (MM) 9.627	Thickness (MM) 0.127	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2377	ID (MM) 3.048	OD (MM) 11.1	Thickness (MM) 1.27	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2378	ID (MM) 3.048	OD (MM) 11.252	Thickness (MM) 1.549	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2379	ID (MM) 3.048	OD (MM) 11.887	Thickness (MM) 0.483	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2380	ID (MM) 3.048	OD (MM) 12.065	Thickness (MM) 0.813	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2381	ID (MM) 3.048	OD (MM) 12.7	Thickness (MM) 1.6	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2382	ID (MM) 3.048	OD (MM) 13.462	Thickness (MM) 0.787	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2383	ID (MM) 3.073	OD (MM) 12.649	Thickness (MM) 1.448	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2384	ID (MM) 3.073	OD (MM) 14.021	Thickness (MM) 0.787	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2385	ID (MM) 3.099	OD (MM) 5.486	Thickness (MM) 0.737	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2386	ID (MM) 3.099	OD (MM) 5.842	Thickness (MM) 0.813	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2387	ID (MM) 3.099	OD (MM) 6.375	Thickness (MM) 0.381	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2388	ID (MM) 3.099	OD (MM) 7.823	Thickness (MM) 0.737	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2389	ID (MM) 3.099	OD (MM) 8.661	Thickness (MM) 1.016	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2390	ID (MM) 3.099	OD (MM) 9.347	Thickness (MM) 0.229	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2391	ID (MM) 3.099	OD (MM) 9.525	Thickness (MM) 0.508	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2393	ID (MM) 3.124	OD (MM) 4.445	Thickness (MM) 0.787	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2395	ID (MM) 3.124	OD (MM) 11.1	Thickness (MM) 0.762	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2396	ID (MM) 3.124	OD (MM) 12.675	Thickness (MM) 1.499	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2397	ID (MM) 3.124	OD (MM) 12.7	Thickness (MM) 0.635	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2398	ID (MM) 3.124	OD (MM) 13.487	Thickness (MM) 0.737	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2399	ID (MM) 3.15	OD (MM) 4.648	Thickness (MM) 0.356	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2401	ID (MM) 3.175	OD (MM) 4.318	Thickness (MM) 0.254	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2403	ID (MM) 3.175	OD (MM) 4.75	Thickness (MM) 0.127	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2404	ID (MM) 3.175	OD (MM) 4.75	Thickness (MM) 0.254	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2405	ID (MM) 3.175	OD (MM) 4.75	Thickness (MM) 0.381	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2406	ID (MM) 3.175	OD (MM) 4.75	Thickness (MM) 0.635	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2407	ID (MM) 3.175	OD (MM) 5.791	Thickness (MM) 0.787	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2408	ID (MM) 3.175	OD (MM) 6.198	Thickness (MM) 0.762	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2409	ID (MM) 3.175	OD (MM) 6.35	Thickness (MM) 0.127	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2410	ID (MM) 3.175	OD (MM) 6.35	Thickness (MM) 0.254	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2411	ID (MM) 3.175	OD (MM) 6.35	Thickness (MM) 0.381	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2412	ID (MM) 3.175	OD (MM) 6.35	Thickness (MM) 0.508	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2413	ID (MM) 3.175	OD (MM) 6.35	Thickness (MM) 0.635	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2414	ID (MM) 3.175	OD (MM) 6.35	Thickness (MM) 0.787	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2415	ID (MM) 3.175	OD (MM) 7.163	Thickness (MM) 0.813	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2416	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 0.127	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2417	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 0.254	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2418	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 0.381	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2419	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 0.508	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2420	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 0.635	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2421	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 0.787	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2422	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 1.016	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity
630-2423	ID (MM) 3.175	OD (MM) 7.925	Thickness (MM) 1.27	Material Stainless Steel	ID MM TOL 0.127	OD MM TOL 0.127	Quantity

Metric Stainless Steel Washer Frequently Asked Questions

Below are answers to some of the most common questions about metric stainless steel washers.

What are metric stainless steel washers?
Metric stainless steel washers are flat washers manufactured from austenitic stainless steel (typically Type 301, 302, or 304), dimensioned in millimeters for metric fastener assemblies. They offer excellent corrosion resistance without coatings or plating, making them the preferred metric washer choice for outdoor, marine, food service, pharmaceutical, and other corrosive environments where metric fasteners are specified.

What stainless steel grade do your metric washers use?
Superior Washer metric stainless steel washers are manufactured from Type 301, Type 302, or Type 304 austenitic stainless steel. All three grades provide reliable corrosion resistance for most applications, with Type 301 offering higher strength for formed or spring-style configurations. For elevated chloride environments such as marine or coastal exposure, metric 316 stainless steel washers offer superior chloride resistance and can be produced to order.

What metric sizes are your stainless steel washers available in?
Superior Washer stocks metric stainless steel washers in standard DIN 125, DIN 9021, and ISO 7089/7090 sizes to fit M2 through M30 and larger metric fasteners. The catalog covers a broad range of thicknesses for both narrow and wide-OD metric washer configurations. Custom metric sizes are available to order.

When should I use metric stainless steel washers instead of metric zinc-plated steel?
Metric stainless steel washers provide inherent, permanent corrosion resistance that does not depend on a coating. Metric zinc-plated steel washers will corrode when the zinc is scratched, worn, or exposed to chlorides or prolonged moisture. For outdoor, marine, food processing, medical, or long-term service applications, stainless steel is the correct choice.

Can you produce custom metric stainless steel washers?
Yes. We manufacture custom metric stainless steel washers to your exact millimeter OD, ID, and thickness specifications. Contact us via the Quick Quote form or call NY (631) 273-8282 or SC (803) 366-3250.

Are your metric stainless steel washers made in the USA?
Yes. All metric stainless steel washers are manufactured in the United States under our ISO 9001:2015 certified Quality Management System. Material certifications are available upon request.

Need a different metric material? We also stock brass, copper, nylon, and more in metric sizing. Browse the full flat washers catalog to compare all sizing and material options.