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Flat Washers in Every Size, Material & Tolerance

Flat washers are essential components in fastener assemblies, distributing load evenly across mating surfaces to prevent wear, protect finishes, and ensure joint integrity. As a leading flat washer manufacturer, Superior Washer & Gasket Corp supplies standard washers, large flat washers, and custom flat washers in aluminum, brass, copper, stainless steel, carbon steel, and nylon-manufactured to your exact specifications.

Our ISO 9001:2015 certified quality management system guarantees consistent dimensional accuracy across every order, from prototype quantities to high-volume production runs. Whether you need special flat washers for a unique application or mil-spec flat washers for aerospace and defense, we deliver reliable solutions made in the U.S.A.

  • Standard and custom flat washer sizes in stock
  • Wide selection of materials including stainless steel, brass, aluminum, and nylon
  • ISO 9001:2015 certified manufacturing and quality control
  • Custom flat washers produced to print or sample
  • Competitive pricing with fast turnaround

Showing 22101–22150 of 25,000+ products

SKU ID (MM) OD (MM) Thickness (MM) Material ID MM TOL OD MM TOL Quantity

630-3131

ID (MM) 4.064
OD (MM) 12.7
Thickness (MM) 0.508
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3132

ID (MM) 4.064
OD (MM) 12.7
Thickness (MM) 0.787
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3133

ID (MM) 4.064
OD (MM) 12.7
Thickness (MM) 1.575
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3134

ID (MM) 4.064
OD (MM) 14.224
Thickness (MM) 1.499
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3135

ID (MM) 4.064
OD (MM) 15.824
Thickness (MM) 1.575
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3136

ID (MM) 4.064
OD (MM) 17.501
Thickness (MM) 0.813
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3137

ID (MM) 4.064
OD (MM) 35.535
Thickness (MM) 1.499
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3138

ID (MM) 4.089
OD (MM) 5.512
Thickness (MM) 0.254
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3139

ID (MM) 4.089
OD (MM) 6.02
Thickness (MM) 0.051
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3140

ID (MM) 4.089
OD (MM) 7.899
Thickness (MM) 0.813
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3141

ID (MM) 4.089
OD (MM) 14.224
Thickness (MM) 0.838
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3142

ID (MM) 4.089
OD (MM) 15.469
Thickness (MM) 0.025
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3143

ID (MM) 4.089
OD (MM) 28.499
Thickness (MM) 1.448
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3144

ID (MM) 4.115
OD (MM) 7.163
Thickness (MM) 0.813
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3145

ID (MM) 4.115
OD (MM) 9.119
Thickness (MM) 0.787
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3146

ID (MM) 4.115
OD (MM) 9.423
Thickness (MM) 0.635
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3147

ID (MM) 4.115
OD (MM) 9.423
Thickness (MM) 2.286
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3148

ID (MM) 4.14
OD (MM) 7.62
Thickness (MM) 0.965
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3149

ID (MM) 4.14
OD (MM) 9.5
Thickness (MM) 0.762
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3150

ID (MM) 4.14
OD (MM) 11.862
Thickness (MM) 0.787
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3151

ID (MM) 4.166
OD (MM) 5.537
Thickness (MM) 0.051
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3152

ID (MM) 4.166
OD (MM) 22.174
Thickness (MM) 3.023
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3153

ID (MM) 4.191
OD (MM) 6.223
Thickness (MM) 0.254
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3154

ID (MM) 4.191
OD (MM) 6.274
Thickness (MM) 0.406
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3155

ID (MM) 4.191
OD (MM) 6.452
Thickness (MM) 0.508
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3156

ID (MM) 4.191
OD (MM) 6.579
Thickness (MM) 0.127
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3157

ID (MM) 4.191
OD (MM) 6.883
Thickness (MM) 0.178
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3158

ID (MM) 4.191
OD (MM) 7.112
Thickness (MM) 0.051
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3159

ID (MM) 4.191
OD (MM) 7.239
Thickness (MM) 0.965
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3160

ID (MM) 4.191
OD (MM) 7.798
Thickness (MM) 0.254
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3161

ID (MM) 4.191
OD (MM) 7.849
Thickness (MM) 0.508
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3162

ID (MM) 4.191
OD (MM) 7.899
Thickness (MM) 0.787
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3163

ID (MM) 4.191
OD (MM) 8.661
Thickness (MM) 1.168
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3164

ID (MM) 4.191
OD (MM) 9.525
Thickness (MM) 0.483
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3165

ID (MM) 4.191
OD (MM) 9.804
Thickness (MM) 0.508
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3166

ID (MM) 4.191
OD (MM) 14.148
Thickness (MM) 1.295
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3167

ID (MM) 4.216
OD (MM) 5.842
Thickness (MM) 0.254
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3168

ID (MM) 4.216
OD (MM) 6.299
Thickness (MM) 0.254
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3169

ID (MM) 4.216
OD (MM) 11.913
Thickness (MM) 0.762
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3170

ID (MM) 4.216
OD (MM) 12.573
Thickness (MM) 1.016
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3171

ID (MM) 4.216
OD (MM) 12.7
Thickness (MM) 0.127
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3172

ID (MM) 4.242
OD (MM) 7.899
Thickness (MM) 0.254
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3173

ID (MM) 4.242
OD (MM) 9.957
Thickness (MM) 0.051
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3174

ID (MM) 4.242
OD (MM) 14.275
Thickness (MM) 0.203
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3175

ID (MM) 4.267
OD (MM) 6.248
Thickness (MM) 0.127
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3176

ID (MM) 4.267
OD (MM) 6.248
Thickness (MM) 0.508
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3177

ID (MM) 4.267
OD (MM) 7.112
Thickness (MM) 0.381
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3178

ID (MM) 4.267
OD (MM) 8.306
Thickness (MM) 0.406
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3179

ID (MM) 4.267
OD (MM) 8.763
Thickness (MM) 0.762
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity

630-3180

ID (MM) 4.267
OD (MM) 9.449
Thickness (MM) 0.406
Material Stainless Steel
ID MM TOL 0.127
OD MM TOL 0.127
Quantity