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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.
Description
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.

