Home | Round Flat Washers - Precision Stamped in Any Material

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

650-6631-240

ID 0.937
OD 1.749
Thickness 0.24
Material Steel Low Carbon
ID TOL +-.010
OD TOL +-.010
Quantity

650-6632-238

ID 0.655
OD 1.998
Thickness 0.238
Material Steel Low Carbon
ID TOL +-.010
OD TOL +-.010
Quantity

650-6633-026

ID 1.377
OD 2.134
Thickness 0.026
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6634-178

ID 0.502
OD 2.5
Thickness 0.178
Material Steel Low Carbon
ID TOL +-.010
OD TOL +-.010
Quantity

650-6635-064

ID 2.157
OD 2.516
Thickness 0.064
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6636-014

ID 0.346
OD 0.564
Thickness 0.014
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6637-062

ID 0.501
OD 0.937
Thickness 0.062
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6638-090

ID 0.41
OD 0.984
Thickness 0.09
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6639-096

ID 0.534
OD 1.062
Thickness 0.096
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-664-025

ID 0.147
OD 0.562
Thickness 0.025
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6640-078

ID 0.539
OD 1.064
Thickness 0.078
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6641-064

ID 0.769
OD 1.187
Thickness 0.064
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6642-075

ID 1.019
OD 1.45
Thickness 0.075
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6643-115

ID 0.941
OD 1.747
Thickness 0.115
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6644-117

ID 0.442
OD 1.998
Thickness 0.117
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6645-015

ID 1.815
OD 2.502
Thickness 0.015
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6646-041

ID 0.268
OD 0.366
Thickness 0.041
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6647-031

ID 0.262
OD 0.565
Thickness 0.031
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6648-037

ID 0.267
OD 0.624
Thickness 0.037
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6649-058

ID 0.352
OD 0.625
Thickness 0.058
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-665-031

ID 0.148
OD 0.31
Thickness 0.031
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6650-074

ID 0.347
OD 0.628
Thickness 0.074
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6651-058

ID 0.266
OD 0.735
Thickness 0.058
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6652-060

ID 0.509
OD 0.751
Thickness 0.06
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6653-074

ID 0.407
OD 0.813
Thickness 0.074
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6654-030

ID 0.124
OD 1.0
Thickness 0.03
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6655-058

ID 0.347
OD 1.248
Thickness 0.058
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6656-129

ID 0.816
OD 1.57
Thickness 0.129
Material Steel Low Carbon
ID TOL +-.010
OD TOL +-.010
Quantity

650-6657-060

ID 1.126
OD 1.717
Thickness 0.06
Material Steel Low Carbon
ID TOL +-.010
OD TOL +-.010
Quantity

650-6658-095

ID 0.499
OD 1.746
Thickness 0.095
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.010
Quantity

650-6659-182

ID 0.379
OD 2.499
Thickness 0.182
Material Steel Low Carbon
ID TOL +-.010
OD TOL +-.010
Quantity

650-666-030

ID 0.148
OD 0.313
Thickness 0.03
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6660-020

ID 0.169
OD 0.283
Thickness 0.02
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6661-060

ID 0.195
OD 0.405
Thickness 0.06
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6662-059

ID 0.132
OD 0.406
Thickness 0.059
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6663-032

ID 0.507
OD 0.742
Thickness 0.032
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6664-060

ID 0.752
OD 0.907
Thickness 0.06
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6665-040

ID 0.674
OD 1.0
Thickness 0.04
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6666-058

ID 0.407
OD 1.246
Thickness 0.058
Material Steel Low Carbon
ID TOL +_.005
OD TOL +-.005
Quantity

650-6667-039

ID 0.251
OD 1.348
Thickness 0.039
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6668-025

ID 0.204
OD 0.434
Thickness 0.025
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6669-033

ID 0.122
OD 0.501
Thickness 0.033
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-667-031

ID 0.148
OD 0.373
Thickness 0.031
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6670-030

ID 0.251
OD 0.551
Thickness 0.03
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6671-041

ID 0.265
OD 0.564
Thickness 0.041
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6672-010

ID 0.365
OD 0.631
Thickness 0.01
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6673-116

ID 0.189
OD 0.753
Thickness 0.116
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6674-079

ID 0.519
OD 0.875
Thickness 0.079
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6676-061

ID 0.935
OD 1.375
Thickness 0.061
Material Steel Low Carbon
ID TOL +-.005
OD TOL +-.005
Quantity

650-6677-175

ID 0.501
OD 1.486
Thickness 0.175
Material Steel Low Carbon
ID TOL +-.010
OD TOL +-.010
Quantity

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.