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

300-1544-060

ID 0.293
OD 0.554
Thickness 0.06
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1545-015

ID 0.293
OD 0.621
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1546-010

ID 0.294
OD 0.368
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1547-019

ID 0.294
OD 0.487
Thickness 0.019
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1548-019

ID 0.294
OD 0.624
Thickness 0.019
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1549-005

ID 0.296
OD 0.368
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-155-015

ID 0.096
OD 0.168
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1550-015

ID 0.296
OD 0.369
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1551-046

ID 0.296
OD 0.494
Thickness 0.046
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1552-031

ID 0.296
OD 0.505
Thickness 0.031
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1553-079

ID 0.297
OD 0.64
Thickness 0.079
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1554-016

ID 0.298
OD 0.749
Thickness 0.016
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1555-061

ID 0.299
OD 0.641
Thickness 0.061
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1556-030

ID 0.3
OD 0.438
Thickness 0.03
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1557-040

ID 0.3
OD 0.492
Thickness 0.04
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1558-015

ID 0.3
OD 0.495
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1559-032

ID 0.3
OD 0.5
Thickness 0.032
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-156-006

ID 0.096
OD 0.2
Thickness 0.006
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1560-025

ID 0.3
OD 1.082
Thickness 0.025
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1561-016

ID 0.303
OD 0.371
Thickness 0.016
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1562-030

ID 0.303
OD 0.862
Thickness 0.03
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1563-054

ID 0.305
OD 0.724
Thickness 0.054
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1564-010

ID 0.308
OD 0.438
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1565-018

ID 0.308
OD 0.495
Thickness 0.018
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1566-012

ID 0.308
OD 0.669
Thickness 0.012
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1567-120

ID 0.308
OD 1.496
Thickness 0.12
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1568-060

ID 0.31
OD 1.257
Thickness 0.06
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1569-005

ID 0.311
OD 0.354
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-157-010

ID 0.096
OD 0.231
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1570-005

ID 0.312
OD 0.365
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1571-012

ID 0.312
OD 0.564
Thickness 0.012
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1572-001

ID 0.313
OD 0.421
Thickness 0.001
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1573-005

ID 0.313
OD 0.437
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1574-010

ID 0.313
OD 0.438
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1575-050

ID 0.313
OD 0.439
Thickness 0.05
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1576-010

ID 0.313
OD 0.621
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1577-005

ID 0.313
OD 0.625
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1578-015

ID 0.313
OD 0.688
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1579-048

ID 0.313
OD 0.689
Thickness 0.048
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-158-005

ID 0.096
OD 0.246
Thickness 0.005
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1580-015

ID 0.313
OD 0.736
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1581-059

ID 0.313
OD 0.737
Thickness 0.059
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1582-015

ID 0.313
OD 0.75
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1583-048

ID 0.313
OD 0.75
Thickness 0.048
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1584-015

ID 0.313
OD 0.806
Thickness 0.015
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1585-048

ID 0.313
OD 0.807
Thickness 0.048
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1586-003

ID 0.314
OD 0.375
Thickness 0.003
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1587-010

ID 0.314
OD 0.403
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1588-010

ID 0.314
OD 0.56
Thickness 0.01
Material Stainless Steel
ID TOL +-.005
OD TOL +-.005
Quantity

300-1588-032

ID 0.314
OD 0.56
Thickness 0.032
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.