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 1–50 of 1,279 products

SKU ID OD Thickness Material Size Quantity

0

ID 0.064
OD 0.125
Thickness 0.019
Material Brass
Size 0
Quantity

0-156020

ID 0.062
OD 0.156
Thickness 0.02
Material Stainless Steel
Size 0
Quantity

00

ID 0.05
OD 0.109
Thickness 0.015
Material Brass
Size 00
Quantity

00-108015

ID 0.053
OD 0.108
Thickness 0.015
Material Stainless Steel
Size 0
Quantity

000

ID 0.037
OD 0.078
Thickness 0.012
Material Brass
Size 000
Quantity

000-090010

ID 0.04
OD 0.09
Thickness 0.01
Material Stainless Steel
Size 0
Quantity

0S

ID 0.064
OD 0.156
Thickness 0.019
Material Brass
Size 0S
Quantity

1"

ID 1.062
OD 2.5
Thickness 0.144
Material Brass
Size 1"
Quantity

1"R

ID 1.062
OD 2.5
Thickness 0.125
Material Brass
Size 1"R
Quantity

1-1/4R

ID 1.312
OD 3.0
Thickness 0.125
Material Brass
Size 1-1/4R
Quantity

1-1/8R

ID 1.187
OD 2.75
Thickness 0.125
Material Brass
Size 1-1/8R
Quantity

1.125

ID 1.187
OD 2.75
Thickness 0.156
Material Brass
Size 1.125
Quantity

1.25

ID 1.312
OD 3.0
Thickness 0.156
Material Brass
Size 1.25
Quantity

1.375

ID 1.437
OD 3.25
Thickness 0.156
Material Brass
Size 1.375
Quantity

1.5

ID 1.562
OD 3.5
Thickness 0.156
Material Brass
Size 1.5
Quantity

1/2-L

ID 0.562
OD 1.375
Thickness 0.091
Material Brass
Size 1/2 L
Quantity

1/2-S

ID 0.562
OD 1.25
Thickness 0.091
Material Brass
Size 1/2 S
Quantity

10-375040

ID 0.203
OD 0.375
Thickness 0.04
Material Stainless Steel
Size 10
Quantity

10-375050

ID 0.203
OD 0.375
Thickness 0.05
Material Stainless Steel
Size 10
Quantity

10-406040

ID 0.203
OD 0.406
Thickness 0.04
Material Stainless Steel
Size 10
Quantity

10-437040

ID 0.203
OD 0.437
Thickness 0.04
Material Stainless Steel
Size 10
Quantity

10-437050

ID 0.203
OD 0.437
Thickness 0.05
Material Stainless Steel
Size 10
Quantity

10-437062

ID 0.203
OD 0.437
Thickness 0.062
Material Stainless Steel
Size 10
Quantity

10-500062

ID 0.218
OD 0.5
Thickness 0.062
Material Stainless Steel
Size 10
Quantity

10-562040

ID 0.203
OD 0.562
Thickness 0.04
Material Stainless Steel
Size 10
Quantity

10-562050

ID 0.203
OD 0.562
Thickness 0.05
Material Stainless Steel
Size 10
Quantity

10-625050

ID 0.203
OD 0.625
Thickness 0.05
Material Stainless Steel
Size 10
Quantity

10L

ID 0.2
OD 0.5
Thickness 0.04
Material Brass
Size 10L
Quantity

10S

ID 0.2
OD 0.437
Thickness 0.036
Material Brass
Size 10S
Quantity

12-500040

ID 0.227
OD 0.5
Thickness 0.04
Material Stainless Steel
Size 12
Quantity

12-500050

ID 0.227
OD 0.5
Thickness 0.05
Material Stainless Steel
Size 12
Quantity

12L

ID 0.227
OD 0.562
Thickness 0.04
Material Brass
Size 12L
Quantity

12S

ID 0.227
OD 0.5
Thickness 0.04
Material Brass
Size 12S
Quantity

14-500062

ID 0.281
OD 0.5
Thickness 0.062
Material Stainless Steel
Size 1/4
Quantity

14-625050

ID 0.281
OD 0.625
Thickness 0.05
Material Stainless Steel
Size 1/4
Quantity

14-625062

ID 0.281
OD 0.625
Thickness 0.062
Material Stainless Steel
Size 1/4
Quantity

14-687050

ID 0.265
OD 0.687
Thickness 0.05
Material Stainless Steel
Size 1/4
Quantity

14-750062

ID 0.281
OD 0.75
Thickness 0.062
Material Stainless Steel
Size 1/4
Quantity

14L

ID 0.26
OD 0.687
Thickness 0.051
Material Brass
Size 14L
Quantity

14S

ID 0.26
OD 0.562
Thickness 0.04
Material Brass
Size 14S
Quantity

16-750050

ID 0.312
OD 0.75
Thickness 0.05
Material Stainless Steel
Size 2/7
Quantity

16-Jul

ID 0.5
OD 1.125
Thickness 0.081
Material Brass
Size 16-Jul
Quantity

16L

ID 0.282
OD 0.75
Thickness 0.064
Material Brass
Size 16L
Quantity

16S

ID 0.282
OD 0.625
Thickness 0.04
Material Brass
Size 16S
Quantity

18-625062

ID 0.343
OD 0.625
Thickness 0.062
Material Stainless Steel
Size 1/3
Quantity

18-687062

ID 0.343
OD 0.687
Thickness 0.062
Material Stainless Steel
Size 1/3
Quantity

18-750050

ID 0.343
OD 0.75
Thickness 0.05
Material Stainless Steel
Size 1/3
Quantity

18-750062

ID 0.343
OD 0.75
Thickness 0.062
Material Stainless Steel
Size 1/3
Quantity

18-875062

ID 0.343
OD 0.875
Thickness 0.062
Material Stainless Steel
Size 1/3
Quantity

18L

ID 0.31
OD 0.875
Thickness 0.064
Material Brass
Size 18L
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.