Home | Standard Flat Washers - General-Purpose Washers in All Sizes & Materials

Standard Flat Washers - General-Purpose Washers in All Sizes & Materials

Standard washers are the most widely used fastener components across industrial, commercial, and consumer applications, providing reliable load distribution, surface protection, and joint stability. Superior Washer & Gasket Corp supplies standard flat washers in a comprehensive range of sizes and materials-including steel, stainless steel, brass, aluminum, copper, and nylon-from one of the largest domestic washer inventories available.

As an ISO 9001:2015 certified washer manufacturer, we maintain broad inventory of standard washers for fast delivery and offer custom washer production for non-standard sizes and materials. Whether you need standard SAE or USS washers or custom flat washers in specialty materials, our washer supply capabilities deliver consistent quality made in the U.S.A.

  • SAE and USS standard washer sizes in stock
  • Steel, stainless steel, brass, aluminum, and nylon options
  • Custom standard and special washers available
  • ISO 9001:2015 certified quality management
  • Made in the U.S.A. with fast delivery

Showing 1251–1279 of 1,279 products

SKU ID OD Thickness Material Size Quantity

T20-750062NM

ID 0.378
OD 0.75
Thickness 0.062
Material PTFE
Size 3/8
Quantity

T22-750031NM

ID 0.443
OD 0.75
Thickness 0.031
Material PTFE
Size 7/16
Quantity

T22-750062NM

ID 0.443
OD 0.75
Thickness 0.062
Material PTFE
Size 7/16
Quantity

T24-125062NM

ID 0.562
OD 1.25
Thickness 0.062
Material PTFE
Size 1/2
Quantity

T24-750031NM

ID 0.505
OD 0.75
Thickness 0.031
Material PTFE
Size 1/2
Quantity

T24-750062NM

ID 0.505
OD 0.75
Thickness 0.062
Material PTFE
Size 1/2
Quantity

T24-875031NM

ID 0.515
OD 0.875
Thickness 0.031
Material PTFE
Size 1/2
Quantity

T24-875062NM

ID 0.515
OD 0.875
Thickness 0.062
Material PTFE
Size 1/2
Quantity

T28-131093NM

ID 0.656
OD 1.312
Thickness 0.093
Material PTFE
Size 3/8
Quantity

T3-250020NM

ID 0.105
OD 0.25
Thickness 0.02
Material PTFE
Size #3
Quantity

T30-146093NM

ID 0.812
OD 1.469
Thickness 0.093
Material PTFE
Size 3/4
Quantity

T4-250020NM

ID 0.115
OD 0.25
Thickness 0.02
Material PTFE
Size #4
Quantity

T4-250031NM

ID 0.115
OD 0.25
Thickness 0.031
Material PTFE
Size #4
Quantity

T4-250062NM

ID 0.115
OD 0.25
Thickness 0.062
Material PTFE
Size #4
Quantity

T4-281030NM

ID 0.125
OD 0.281
Thickness 0.03
Material PTFE
Size #4
Quantity

T4-281031NM

ID 0.115
OD 0.281
Thickness 0.031
Material PTFE
Size #4
Quantity

T4-281050NM

ID 0.115
OD 0.281
Thickness 0.05
Material PTFE
Size #4
Quantity

T4-281062NM

ID 0.115
OD 0.281
Thickness 0.062
Material PTFE
Size #4
Quantity

T5-250020NM

ID 0.125
OD 0.25
Thickness 0.02
Material PTFE
Size #5
Quantity

T6-250031NM

ID 0.141
OD 0.25
Thickness 0.031
Material PTFE
Size #6
Quantity

T6-250062NM

ID 0.141
OD 0.25
Thickness 0.062
Material PTFE
Size #6
Quantity

T6-312031NM

ID 0.141
OD 0.312
Thickness 0.031
Material PTFE
Size #6
Quantity

T6-312050NM

ID 0.141
OD 0.312
Thickness 0.05
Material PTFE
Size #6
Quantity

T6-312062NM

ID 0.141
OD 0.312
Thickness 0.062
Material PTFE
Size #6
Quantity

T6-312090NM

ID 0.156
OD 0.312
Thickness 0.03
Material PTFE
Size #6
Quantity

T6-375062NM

ID 0.141
OD 0.375
Thickness 0.062
Material PTFE
Size #6
Quantity

T8-375030NM

ID 0.187
OD 0.375
Thickness 0.03
Material PTFE
Size #8
Quantity

T8-375031NM

ID 0.17
OD 0.375
Thickness 0.031
Material PTFE
Size #8
Quantity

T8-375062NM

ID 0.17
OD 0.375
Thickness 0.062
Material PTFE
Size #8
Quantity

Standard Flat Washer Frequently Asked Questions

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

What are standard flat washers?
Standard flat washers are the most widely used fastener components across industrial, commercial, and consumer applications. They provide reliable load distribution under bolt heads and nuts, protect bearing surfaces from damage, and improve joint stability. Superior Washer stocks standard flat washers in SAE and USS sizes across a comprehensive range of materials including steel, stainless steel, brass, aluminum, nylon, PTFE, fiber, and phenolic.

What is the difference between SAE and USS standard washers?
SAE (Society of Automotive Engineers) washers have a smaller outer diameter relative to the bolt size and are used in applications requiring a more compact bearing surface. USS (United States Standard) washers have a larger outer diameter, providing a broader load distribution area. Both series are stocked in multiple materials at Superior Washer.

What materials are your standard flat washers available in?
Superior Washer standard flat washers are available in 1008/1010 carbon steel, stainless steel (301/302/304), brass (Alloy 260), nylon, PTFE, fiber (vulcanized), and phenolic. Steel and stainless steel are available in both plain and zinc-plated finishes. Material and size options are listed in the product filter on this page.

What types of standard washers do you carry beyond SAE and USS?
In addition to SAE and USS, Superior Washer stocks Type A and Type B flat washers, bolt and screw washers, machine screw washers, N400/N401/N402 series washers, inner and outer race spacers, and race spacers. Standard Brass, Nylon Standard, PTFE Standard, Phenolic Standard, and Standard Fiber types are also available. See the product filter for the full type listing.

Can you produce custom standard washers?
Yes. Our standard washer catalog covers over 1,270 stocked configurations, and we also manufacture custom washers to non-standard dimensions, materials, or finishes. Contact us via the Quick Quote form or call NY (631) 273-8282 or SC (803) 366-3250.

Are your standard flat washers made in the USA?
Yes. All standard flat washers are manufactured in the United States at our facilities in Hauppauge, NY (CAGE Code: 1L160) and Rock Hill, SC (CAGE Code: 4WUG7) under our ISO 9001:2015 certified Quality Management System. Material certifications are available upon request.

Standard sizing is just one part of our catalog. Explore our full range of flat washers to see every material and configuration we offer.