Aluminum Flat Washers - Lightweight Corrosion-Resistant Washers

Aluminum flat washers offer excellent corrosion resistance and a light weight, making them ideal for aerospace, marine, electronics, and weight-sensitive applications where stainless steel or steel washers are too heavy. Superior Washer & Gasket Corp manufactures aluminum flat washers in standard and custom sizes from quality aluminum alloys.

Our ISO 9001:2015 certified manufacturing facility supplies aluminum flat washers from stock inventory and produces custom aluminum washers to your OD, ID, and thickness specifications. All aluminum washers are made in the U.S.A. with material certifications available on request.

Lightweight aluminum for weight-critical applications
Excellent corrosion resistance
Standard and custom aluminum flat washer sizes
ISO 9001:2015 certified quality assurance
Made in the U.S.A.

Showing 501–550 of 620 products

SKU	ID	OD	Thickness	Material	ID TOL	OD TOL	Quantity
475-551-061	ID 0.194	OD 0.5	Thickness 0.061	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-552-031	ID 0.545	OD 0.801	Thickness 0.031	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-553-122	ID 0.409	OD 1.308	Thickness 0.122	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-554-020	ID 0.348	OD 0.745	Thickness 0.02	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-555-050	ID 0.88	OD 0.997	Thickness 0.05	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-556-090	ID 0.815	OD 1.248	Thickness 0.09	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-557-064	ID 0.426	OD 0.754	Thickness 0.064	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-558-031	ID 0.197	OD 0.314	Thickness 0.031	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-559-040	ID 0.248	OD 0.435	Thickness 0.04	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-56-033	ID 0.123	OD 0.186	Thickness 0.033	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-560-031	ID 0.207	OD 0.44	Thickness 0.031	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-561-039	ID 0.165	OD 0.629	Thickness 0.039	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-562-033	ID 0.83	OD 1.25	Thickness 0.033	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-563-063	ID 0.209	OD 0.561	Thickness 0.063	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-57-051	ID 0.123	OD 0.25	Thickness 0.051	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-573-063	ID 0.269	OD 0.688	Thickness 0.063	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-574-020	ID 0.387	OD 0.502	Thickness 0.02	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-575-061	ID 0.269	OD 0.499	Thickness 0.061	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-576-026	ID 0.128	OD 0.501	Thickness 0.026	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-577-063	ID 0.258	OD 0.739	Thickness 0.063	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-578-088	ID 0.196	OD 0.748	Thickness 0.088	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-579-040	ID 0.159	OD 0.482	Thickness 0.04	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-58-062	ID 0.123	OD 0.312	Thickness 0.062	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-580-054	ID 0.266	OD 0.688	Thickness 0.05	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-581-063	ID 0.345	OD 0.874	Thickness 0.063	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-582-031	ID 0.204	OD 0.5	Thickness 0.031	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-583-062	ID 0.189	OD 0.75	Thickness 0.062	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-584-061	ID 1.659	OD 1.874	Thickness 0.061	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-585-061	ID 0.383	OD 0.748	Thickness 0.061	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-586-062	ID 0.176	OD 0.38	Thickness 0.062	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-587-039	ID 0.328	OD 0.5	Thickness 0.039	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-588-062	ID 0.44	OD 0.875	Thickness 0.062	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-589-063	ID 0.194	OD 0.876	Thickness 0.063	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-59-032	ID 0.123	OD 0.75	Thickness 0.032	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-590-093	ID 0.408	OD 1.0	Thickness 0.093	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-591-035	ID 0.257	OD 0.551	Thickness 0.035	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-592-031	ID 0.209	OD 1.123	Thickness 0.031	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-593-061	ID 0.347	OD 0.874	Thickness 0.061	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-594-062	ID 0.116	OD 0.446	Thickness 0.062	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-595-031	ID 0.139	OD 0.705	Thickness 0.031	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-596-078	ID 0.722	OD 1.009	Thickness 0.078	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-597-062	ID 0.208	OD 2.001	Thickness 0.062	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-598-016	ID 0.145	OD 0.405	Thickness 0.016	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-599-032	ID 0.128	OD 0.501	Thickness 0.032	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-60-024	ID 0.124	OD 0.277	Thickness 0.024	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-600-038	ID 0.322	OD 0.5	Thickness 0.038	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-601-063	ID 0.253	OD 1.186	Thickness 0.063	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-602-062	ID 0.69	OD 1.188	Thickness 0.062	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-603-063	ID 0.199	OD 0.475	Thickness 0.063	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity
475-604-049	ID 0.269	OD 0.688	Thickness 0.049	Material Aluminum	ID TOL +-.005	OD TOL +-.005	Quantity

Frequently Asked Questions

Below are answers to some of the most common questions about aluminum flat washers.

What are aluminum flat washers?
Aluminum flat washers are lightweight, corrosion-resistant washers manufactured from quality aluminum alloys. Their low density makes them the preferred choice for aerospace, marine, electronics, and other weight-sensitive applications where steel or stainless steel washers would add unnecessary mass. Superior Washer manufactures aluminum flat washers in standard and custom sizes from its ISO 9001:2015 certified facilities in the USA.

What makes aluminum flat washers a good choice for my application?
Aluminum offers an excellent strength to weight ratio, natural corrosion resistance without the need for plating or coating, and non-magnetic properties. These characteristics make aluminum washers ideal for applications where weight reduction, galvanic compatibility with aluminum fasteners, or non-magnetic requirements are priorities.

What alloys are your aluminum flat washers made from?
Superior Washer manufactures aluminum flat washers from quality aluminum alloys including 2024, 5052, 6061, and other alloys depending on application requirements. Contact us to specify the alloy required for your order.

Can you make custom aluminum flat washers?
Yes. We manufacture custom aluminum flat washers to your exact OD, ID, and thickness specifications. Our stock inventory covers 620 standard sizes, and we produce non-catalog configurations to order. Use our Quick Quote form or call us to discuss your requirements.

Are your aluminum flat washers made in the USA?
Yes. All aluminum flat washers are manufactured in the United States at our facilities in Hauppauge, NY and Rock Hill, SC under our ISO 9001:2015 certified Quality Management System. Material certifications are available upon request.

In addition to aluminum, Superior Washer manufactures flat washers in a wide range of materials and sizes. Browse our complete collection of flat washers to find the right fit for your application.