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 901–950 of 1,280 products

SKU ID OD Thickness Material Size Quantity

S-3/4TYBN

ID 0.812
OD 1.375
Thickness 0.1
Material Steel
Size 3/4
Quantity

S-3/4TYBR

ID 0.812
OD 2.0
Thickness 0.1
Material Steel
Size 3/4
Quantity

S-3/4TYBW

ID 0.812
OD 2.5
Thickness 0.16
Material Steel
Size 3/4
Quantity

S-3/4USS

ID 0.187
OD 2.0
Thickness
Material Steel Zinc
Size 3/4
Quantity

S-3/8TYAN

ID 0.406
OD 0.812
Thickness 0.065
Material Steel
Size 3/8
Quantity

S-3/8TYAW

ID 0.438
OD 1.0
Thickness 0.083
Material Steel
Size 3/8
Quantity

S-3/8TYBN

ID 0.406
OD 0.734
Thickness 0.063
Material Steel
Size 3/8
Quantity

S-3/8TYBR

ID 0.406
OD 1.0
Thickness 0.063
Material Steel
Size 3/8
Quantity

S-3/8TYBW

ID 0.406
OD 1.25
Thickness 0.1
Material Steel
Size 3/8
Quantity

S-3/8USS

ID 0.437
OD 1.0
Thickness
Material Steel Zinc
Size 3/8
Quantity

S-3TYBN

ID 0.109
OD 0.219
Thickness 0.025
Material Steel
Size 3
Quantity

S-3TYBR

ID 0.109
OD 0.312
Thickness 0.032
Material Steel
Size 3
Quantity

S-3TYBW

ID 0.109
OD 0.406
Thickness 0.04
Material Steel
Size 3
Quantity

S-4MSZ

ID 0.125
OD 0.28
Thickness 0.026
Material Steel Zinc Plated
Size 00
Quantity

S-4TYA

ID 0.125
OD 0.312
Thickness 0.032
Material Steel
Size 4
Quantity

S-4TYBN

ID 0.125
OD 0.25
Thickness 0.032
Material Steel
Size 4
Quantity

S-4TYBR

ID 0.125
OD 0.375
Thickness 0.04
Material Steel
Size 4
Quantity

S-4TYBW

ID 0.125
OD 0.438
Thickness 0.04
Material Steel
Size 4
Quantity

S-5/16TYAN

ID 0.344
OD 0.688
Thickness 0.065
Material Steel
Size 5/16
Quantity

S-5/16TYAW

ID 0.375
OD 0.875
Thickness 0.083
Material Steel
Size 5/16
Quantity

S-5/16TYBN

ID 0.344
OD 0.625
Thickness 0.063
Material Steel
Size 5/16
Quantity

S-5/16TYBR

ID 0.344
OD 0.875
Thickness 0.063
Material Steel
Size 5/16
Quantity

S-5/16TYBW

ID 0.344
OD 1.125
Thickness 0.063
Material Steel
Size 5/16
Quantity

S-5/16USS

ID 0.375
OD 0.875
Thickness
Material Steel Zinc
Size 5/16
Quantity

S-5/8TYAN

ID 0.656
OD 1.312
Thickness 0.095
Material Steel
Size 5/8
Quantity

S-5/8TYAW

ID 0.688
OD 1.75
Thickness 0.134
Material Steel
Size 5/8
Quantity

S-5/8TYBN

ID 0.656
OD 1.25
Thickness 0.1
Material Steel
Size 5/8
Quantity

S-5/8TYBR

ID 0.656
OD 1.75
Thickness 0.1
Material Steel
Size 5/8
Quantity

S-5/8TYBW

ID 0.656
OD 2.25
Thickness 0.16
Material Steel
Size 5/8
Quantity

S-5/8USS

ID 0.687
OD 1.75
Thickness
Material Steel Zinc
Size 5/8
Quantity

S-5MSZ

ID 0.14
OD 0.28
Thickness 0.026
Material Steel Zinc Plated
Size 00
Quantity

S-5TYBN

ID 0.141
OD 0.281
Thickness 0.032
Material Steel
Size 5
Quantity

S-5TYBR

ID 0.141
OD 0.406
Thickness 0.04
Material Steel
Size 5
Quantity

S-5TYBW

ID 0.141
OD 0.5
Thickness 0.04
Material Steel
Size 5
Quantity

S-6MSZ

ID 0.15
OD 0.375
Thickness 0.032
Material Steel Zinc Plated
Size 00
Quantity

S-6TYA

ID 0.156
OD 0.375
Thickness 0.049
Material Steel
Size 6
Quantity

S-6TYBN

ID 0.156
OD 0.312
Thickness 0.032
Material Steel
Size 6
Quantity

S-6TYBR

ID 0.156
OD 0.438
Thickness 0.04
Material Steel
Size 6
Quantity

S-6TYBW

ID 0.156
OD 0.562
Thickness 0.04
Material Steel
Size 6
Quantity

S-7/16TYAN

ID 0.469
OD 0.922
Thickness 0.065
Material Steel
Size 7/16
Quantity

S-7/16TYAW

ID 0.5
OD 1.25
Thickness 0.083
Material Steel
Size 7/16
Quantity

S-7/16TYBN

ID 0.469
OD 0.875
Thickness 0.063
Material Steel
Size 7/16
Quantity

S-7/16TYBR

ID 0.469
OD 1.125
Thickness 0.063
Material Steel
Size 7/16
Quantity

S-7/16TYBW

ID 0.469
OD 1.469
Thickness 0.1
Material Steel
Size 7/16
Quantity

S-7/16USS

ID 0.5
OD 1.25
Thickness
Material Steel Zinc
Size 7/16
Quantity

S-7/8TYAN

ID 0.938
OD 1.75
Thickness 0.134
Material Steel
Size 7/8
Quantity

S-7/8TYAW

ID 0.938
OD 2.25
Thickness 0.165
Material Steel
Size 7/8
Quantity

S-7/8TYBN

ID 0.938
OD 1.469
Thickness 0.1
Material Steel
Size 7/8
Quantity

S-7/8TYBR

ID 0.938
OD 2.25
Thickness 0.16
Material Steel
Size 7/8
Quantity

S-7/8TYBW

ID 0.938
OD 2.75
Thickness 0.16
Material Steel
Size 7/8
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.