Round Flat Washers - Precision Stamped in Any Material

Round flat washers are fundamental components in fastener assemblies, providing load distribution, surface protection, and vibration resistance across virtually every industry. Superior Washer & Gasket Corp manufactures round flat washers in a comprehensive range of materials-including aluminum, brass, copper, stainless steel, carbon steel, nylon, PTFE, and specialty alloys-in standard and custom sizes to precise tolerances.

As an ISO 9001:2015 certified flat washer manufacturer, we maintain one of the largest inventories of round flat washers available from a domestic source. Whether you need standard washers by the thousand or special flat washers produced to your custom specifications, our washer manufacturing capabilities deliver fast, reliable solutions made in the U.S.A.

  • Round flat washers in metals, plastics, and specialty materials
  • Broad standard size inventory for fast delivery
  • Custom flat washers stamped to your specifications
  • ISO 9001:2015 certified quality management
  • Made in the U.S.A. with material certifications available
SKU ID OD Thickness Material ID TOL OD TOL Quantity Actions

300-1998-032

ID 0.403
OD 0.455
Thickness 0.032
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1999-003

ID 0.403
OD 0.552
Thickness 0.003
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-20-025

ID 0.0
OD 0.307
Thickness 0.025
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-200-030

ID 0.106
OD 0.315
Thickness 0.03
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2000-063

ID 0.403
OD 0.999
Thickness 0.063
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2001-005

ID 0.404
OD 0.543
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2002-010

ID 0.404
OD 0.562
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2003-016

ID 0.404
OD 0.658
Thickness 0.016
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2004-005

ID 0.404
OD 0.998
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2005-079

ID 0.405
OD 0.749
Thickness 0.079
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2006-005

ID 0.407
OD 0.561
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2007-028

ID 0.407
OD 0.608
Thickness 0.028
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2008-010

ID 0.407
OD 0.623
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2009-030

ID 0.407
OD 0.623
Thickness 0.03
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-201-026

ID 0.106
OD 0.5
Thickness 0.026
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2010-003

ID 0.407
OD 0.998
Thickness 0.003
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2011-180

ID 0.407
OD 1.184
Thickness 0.18
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2012-130

ID 0.407
OD 2.001
Thickness 0.13
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2013-005

ID 0.408
OD 0.468
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2014-010

ID 0.408
OD 0.532
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2015-056

ID 0.408
OD 0.54
Thickness 0.056
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2016-056

ID 0.408
OD 0.683
Thickness 0.056
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2017-036

ID 0.408
OD 0.735
Thickness 0.036
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2018-120

ID 0.408
OD 0.75
Thickness 0.12
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2019-029

ID 0.408
OD 0.803
Thickness 0.029
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-202-030

ID 0.107
OD 0.375
Thickness 0.03
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2020-089

ID 0.408
OD 1.247
Thickness 0.089
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2021-032

ID 0.409
OD 1.0
Thickness 0.032
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2021-120

ID 0.409
OD 1.0
Thickness 0.12
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2022-184

ID 0.409
OD 1.061
Thickness 0.184
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2023-010

ID 0.41
OD 0.562
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2024-018

ID 0.41
OD 0.6
Thickness 0.018
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2025-059

ID 0.41
OD 0.625
Thickness 0.059
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2026-060

ID 0.41
OD 0.691
Thickness 0.06
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2027-060

ID 0.41
OD 0.714
Thickness 0.06
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2028-090

ID 0.41
OD 0.744
Thickness 0.09
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2029-060

ID 0.41
OD 0.781
Thickness 0.06
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-203-030

ID 0.108
OD 0.308
Thickness 0.03
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2030-060

ID 0.41
OD 0.812
Thickness 0.06
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2031-060

ID 0.41
OD 0.936
Thickness 0.06
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2032-061

ID 0.41
OD 0.999
Thickness 0.061
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2033-125

ID 0.41
OD 1.0
Thickness 0.125
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2034-057

ID 0.41
OD 1.001
Thickness 0.057
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2035-121

ID 0.41
OD 1.121
Thickness 0.121
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2036-118

ID 0.41
OD 1.123
Thickness 0.118
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2037-119

ID 0.41
OD 1.125
Thickness 0.119
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2038-090

ID 0.41
OD 1.247
Thickness 0.09
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2039-090

ID 0.41
OD 1.248
Thickness 0.09
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-204-025

ID 0.108
OD 0.312
Thickness 0.025
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-2040-085

ID 0.41
OD 1.312
Thickness 0.085
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

Description

Meeting Your Manufacturing, Material, And Quality Requirements

Numerous factors affect the quality and long-term performance of flat washers. As a U.S.-based manufacturer and an ISO 9001:2015 certified company, we assure you that all parts we ship are manufactured domestically. We offer metal washers made from a diverse range of materials, including conventional options like copper stampings, aluminum washers, and stainless steel washers (which can include passivation). We also specialize in plastic washers and exotic materials like Inconel, Nylatron washers, and Monel. Additionally, we can quote a variety of platings including zinc, cad yellow, and black ox to suit your specific needs.