Home | Aluminum Flat Washers - Lightweight Corrosion-Resistant Washers

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 601–620 of 620 products

SKU ID OD Thickness Material ID TOL OD TOL Quantity

475-80-020

ID 0.13
OD 0.23
Thickness 0.02
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-81-016

ID 0.13
OD 0.247
Thickness 0.016
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-82-031

ID 0.13
OD 0.28
Thickness 0.031
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-83-031

ID 0.131
OD 0.281
Thickness 0.031
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-84-033

ID 0.131
OD 0.748
Thickness 0.033
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-85-031

ID 0.132
OD 0.248
Thickness 0.031
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-86-016

ID 0.132
OD 0.375
Thickness 0.016
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-87-020

ID 0.133
OD 0.28
Thickness 0.02
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-88-018

ID 0.133
OD 0.373
Thickness 0.018
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-89-032

ID 0.135
OD 0.3
Thickness 0.032
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-90-032

ID 0.135
OD 0.311
Thickness 0.032
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-91-033

ID 0.136
OD 0.343
Thickness 0.033
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-92-032

ID 0.138
OD 0.31
Thickness 0.032
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-93-039

ID 0.139
OD 0.309
Thickness 0.039
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-94-062

ID 0.139
OD 0.394
Thickness 0.062
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-95-032

ID 0.139
OD 0.401
Thickness 0.032
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-96-016

ID 0.139
OD 0.623
Thickness 0.016
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-97-020

ID 0.14
OD 0.28
Thickness 0.02
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-98-040

ID 0.141
OD 0.484
Thickness 0.04
Material Aluminum
ID TOL +-.005
OD TOL +-.005
Quantity

475-99-016

ID 0.143
OD 0.247
Thickness 0.016
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.