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

300-1177-047

ID 0.251
OD 0.454
Thickness 0.047
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1178-056

ID 0.251
OD 0.462
Thickness 0.056
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1179-014

ID 0.251
OD 0.469
Thickness 0.014
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-118-025

ID 0.09
OD 0.248
Thickness 0.025
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1180-042

ID 0.251
OD 0.495
Thickness 0.042
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1181-031

ID 0.251
OD 0.541
Thickness 0.031
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1182-004

ID 0.251
OD 0.551
Thickness 0.004
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1183-032

ID 0.251
OD 0.561
Thickness 0.032
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1184-005

ID 0.251
OD 0.75
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1185-062

ID 0.251
OD 0.751
Thickness 0.062
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1186-005

ID 0.252
OD 0.355
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1187-005

ID 0.252
OD 0.625
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1188-048

ID 0.252
OD 0.65
Thickness 0.048
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1189-005

ID 0.252
OD 0.998
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-119-003

ID 0.09
OD 0.373
Thickness 0.003
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1190-002

ID 0.253
OD 0.281
Thickness 0.002
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1191-008

ID 0.253
OD 0.286
Thickness 0.008
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1192-010

ID 0.253
OD 0.291
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1193-003

ID 0.253
OD 0.296
Thickness 0.003
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1194-005

ID 0.253
OD 0.299
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1195-001

ID 0.253
OD 0.302
Thickness 0.001
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1196-021

ID 0.253
OD 0.307
Thickness 0.021
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1197-002

ID 0.253
OD 0.311
Thickness 0.002
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1198-006

ID 0.253
OD 0.312
Thickness 0.006
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1199-017

ID 0.253
OD 0.324
Thickness 0.017
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-12-005

ID 0.0
OD 0.173
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-120-010

ID 0.091
OD 0.118
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1200-001

ID 0.253
OD 0.327
Thickness 0.001
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1201-001

ID 0.253
OD 0.34
Thickness 0.001
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1202-010

ID 0.253
OD 0.34
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1203-015

ID 0.253
OD 0.341
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1204-002

ID 0.253
OD 0.358
Thickness 0.002
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1205-016

ID 0.253
OD 0.358
Thickness 0.016
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1206-050

ID 0.253
OD 0.359
Thickness 0.05
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1207-020

ID 0.253
OD 0.381
Thickness 0.02
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1208-005

ID 0.253
OD 0.393
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1209-002

ID 0.253
OD 0.406
Thickness 0.002
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-121-010

ID 0.091
OD 0.12
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1210-031

ID 0.253
OD 0.406
Thickness 0.031
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1211-005

ID 0.253
OD 0.421
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1212-031

ID 0.253
OD 0.421
Thickness 0.031
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1213-008

ID 0.253
OD 0.427
Thickness 0.008
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1214-016

ID 0.253
OD 0.434
Thickness 0.016
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1215-005

ID 0.253
OD 0.457
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1216-033

ID 0.253
OD 0.465
Thickness 0.033
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1217-031

ID 0.253
OD 0.481
Thickness 0.031
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1218-001

ID 0.253
OD 0.495
Thickness 0.001
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1219-010

ID 0.253
OD 0.495
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-122-038

ID 0.091
OD 0.5
Thickness 0.038
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1220-062

ID 0.253
OD 0.5
Thickness 0.062
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.