Home | Kapton® Flat Washers - Polyimide Film Washers for High-Temperature Use

Kapton® Flat Washers - Polyimide Film Washers for High-Temperature Use

Kapton® flat washers are made from DuPont™ polyimide film, offering an exceptional combination of high-temperature resistance (up to 400°C), excellent electrical insulation, and chemical stability. These plastic washers are widely used in aerospace, electronics, and semiconductor manufacturing where extreme thermal performance is required.

Superior Washer & Gasket Corp manufactures Kapton washers in standard and custom sizes with ISO 9001:2015 certified quality control. Our high-performance plastic washer capabilities include Kapton, Mylar, PTFE, and Mica washers for the most demanding thermal and electrical insulation applications-all made in the U.S.A.

  • Kapton® polyimide for high-temperature performance up to 400°C
  • Superior electrical insulation properties
  • Standard and custom Kapton washer sizes
  • ISO 9001:2015 certified manufacturing
  • Made in the U.S.A.

Showing 1–18 of 18 products

SKU ID OD Thickness Material ID TOL OD TOL Quantity

320-10-005

ID 0.094
OD 0.139
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-11-005

ID 0.092
OD 0.151
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-12-005

ID 0.091
OD 0.201
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-13-005

ID 0.127
OD 0.233
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-14-005

ID 0.093
OD 0.25
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-15-005

ID 0.124
OD 0.312
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-16-005

ID 0.253
OD 0.322
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-17-005

ID 0.202
OD 0.564
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-18-005

ID 0.092
OD 0.73
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-19-005

ID 0.923
OD 1.237
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-20-005

ID 0.063
OD 0.218
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-21-005

ID 0.094
OD 0.25
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-22-005

ID 0.101
OD 0.25
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-23-005

ID 0.125
OD 0.312
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-24-005

ID 0.156
OD 0.375
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-25-005

ID 0.196
OD 0.5
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-26-005

ID 0.203
OD 0.625
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

320-27-005

ID 0.088
OD 0.198
Thickness 0.005
Material Kapton
ID TOL +-.005
OD TOL +-.005
Quantity

Kapton Flat Washer Frequently Asked Questions

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

What are Kapton flat washers?
Kapton flat washers are manufactured from Kapton polyimide film, a high-performance material produced by DuPont. Kapton is known for its exceptional thermal stability across an extremely wide temperature range, excellent electrical insulation properties, and outstanding chemical resistance, making it a critical material in aerospace, electronics, and cryogenic applications.

What temperature range can Kapton washers handle?
Kapton polyimide maintains its electrical and mechanical properties across a temperature range of approximately -452 degrees F to +500 degrees F (-269 degrees C to +260 degrees C), making it one of the few materials suitable for both cryogenic and high-temperature applications in the same assembly.

What are Kapton washers used for?
Kapton washers are used primarily as electrical insulators in aerospace electronics, flexible circuits, satellite assemblies, wire insulation, and cryogenic equipment. Their combination of thin profile, high dielectric strength, and extreme temperature stability makes them irreplaceable in applications where other insulating materials would fail.

Can you make custom Kapton flat washers?
Yes. Superior Washer manufactures custom Kapton washers to your OD, ID, and thickness specifications. Kapton is available in various film thicknesses. Contact us via the Quick Quote form to discuss your requirements.

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

Kapton is just one of the specialty insulating materials we offer. Explore our complete range of flat washers to see all available material options.