Home | Round Flat - Delrin®

Round Flat - Delrin®

Superior Washer & Gasket Corp is a leading U.S. manufacturer and supplier of round flat - delrin®, serving industrial, aerospace, defense, and OEM customers. As an ISO 9001:2015 certified company, we maintain the highest standards of quality in every washer and fastener component we produce.

We offer round flat - delrin® from extensive inventory and manufacture custom configurations to your exact dimensional and material specifications. Our broad manufacturing capabilities ensure we can deliver the right solution for your application-from standard sizes to fully custom washers-all made in the U.S.A.

  • Broad inventory of round flat - delrin® for fast delivery
  • Custom sizes and materials available
  • ISO 9001:2015 certified quality management
  • DFARS compliance and certifications available where applicable
  • Made in the U.S.A.

Showing 1–50 of 86 products

SKU ID OD Thickness Material ID TOL OD TOL Quantity

490-11-016

ID 0.039
OD 0.125
Thickness 0.016
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-12-010

ID 0.068
OD 0.125
Thickness 0.01
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-13-016

ID 0.093
OD 0.187
Thickness 0.016
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-14-031

ID 0.093
OD 0.25
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-15-050

ID 0.097
OD 0.3
Thickness 0.05
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-16-040

ID 0.1
OD 0.184
Thickness 0.04
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-17-016

ID 0.1
OD 0.248
Thickness 0.016
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-18-031

ID 0.111
OD 0.248
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-19-010

ID 0.12
OD 0.229
Thickness 0.01
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-20-031

ID 0.12
OD 0.248
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-21-031

ID 0.124
OD 0.19
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-22-040

ID 0.124
OD 0.281
Thickness 0.04
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-23-031

ID 0.125
OD 0.25
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-24-031

ID 0.125
OD 0.312
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-25-031

ID 0.125
OD 0.375
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-26-016

ID 0.129
OD 0.281
Thickness 0.016
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-27-016

ID 0.129
OD 0.337
Thickness 0.016
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-28-020

ID 0.139
OD 0.25
Thickness 0.02
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-29-031

ID 0.141
OD 0.25
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-30-031

ID 0.141
OD 0.312
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-31-031

ID 0.141
OD 0.375
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-32-040

ID 0.156
OD 0.313
Thickness 0.04
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-33-062

ID 0.158
OD 0.314
Thickness 0.062
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-34-015

ID 0.168
OD 0.375
Thickness 0.015
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-35-031

ID 0.171
OD 0.375
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-36-062

ID 0.176
OD 0.314
Thickness 0.062
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-37-031

ID 0.187
OD 0.373
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-38-010

ID 0.19
OD 0.373
Thickness 0.01
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-39-010

ID 0.191
OD 0.372
Thickness 0.01
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-40-040

ID 0.192
OD 0.313
Thickness 0.04
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-41-031

ID 0.193
OD 0.313
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-42-050

ID 0.195
OD 0.279
Thickness 0.05
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-43-031

ID 0.195
OD 0.375
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-44-025

ID 0.197
OD 0.313
Thickness 0.025
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-45-010

ID 0.198
OD 0.362
Thickness 0.01
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-46-031

ID 0.2
OD 0.312
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-47-031

ID 0.201
OD 0.311
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-48-062

ID 0.218
OD 0.437
Thickness 0.062
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-49-062

ID 0.223
OD 0.503
Thickness 0.062
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-50-010

ID 0.224
OD 0.368
Thickness 0.01
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-51-031

ID 0.227
OD 0.5
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-52-032

ID 0.253
OD 0.438
Thickness 0.032
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-53-025

ID 0.253
OD 0.5
Thickness 0.025
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-53-031

ID 0.253
OD 0.5
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-54-062

ID 0.253
OD 0.562
Thickness 0.062
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-55-062

ID 0.255
OD 0.437
Thickness 0.062
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-56-032

ID 0.263
OD 0.498
Thickness 0.032
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-57-031

ID 0.265
OD 0.818
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-58-018

ID 0.266
OD 0.498
Thickness 0.018
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

490-59-031

ID 0.267
OD 0.815
Thickness 0.031
Material Delrin®
ID TOL +-.005
OD TOL +-.005
Quantity

Delrin Flat Washer Frequently Asked Questions

Below are answers to some of the most common questions about Delrin flat washers.

What are Delrin flat washers?
Delrin flat washers are manufactured from acetal homopolymer (POM-H), an engineering plastic produced by DuPont under the Delrin brand name. Delrin offers high stiffness, low friction, excellent fatigue resistance, and good dimensional stability, making it a versatile choice for mechanical assemblies in automotive, consumer products, electronics, and industrial equipment.

What makes Delrin a good washer material?
Delrin is self-lubricating, which reduces friction and wear in moving assemblies. It has a low coefficient of friction, resists creep under sustained loads, and maintains its dimensions across a wide temperature range. It is also non-conductive and non-magnetic, making it suitable for electrical isolation applications.

How does Delrin compare to nylon as a washer material?
Delrin has lower moisture absorption than nylon, which means its dimensions are more stable in humid or wet environments. It is also stiffer and has better creep resistance. Nylon has slightly better impact resistance and is generally more chemical resistant to bases and alcohols. For precision mechanical applications, Delrin is typically the preferred choice.

Can you make custom Delrin flat washers?
Yes. Superior Washer manufactures custom Delrin washers to your OD, ID, and thickness specifications. Contact us via the Quick Quote form or by phone.

Are your Delrin flat washers made in the USA?
Yes. All Delrin flat washers are manufactured in the United States under our ISO 9001:2015 certified Quality Management System. Material certifications are available upon request.

Looking for a different material? We carry an extensive range of metal and plastic flat washer options. Check out our full flat washers collection to find what suits your project.