Home | Polypropylene Flat Washers - Lightweight Chemical-Resistant Washers

Polypropylene Flat Washers - Lightweight Chemical-Resistant Washers

Polypropylene flat washers are lightweight, chemically resistant, and cost-effective for use in plumbing, chemical processing, food processing, and electrical applications. Their resistance to most acids, bases, and solvents makes them a popular plastic washer choice where chemical compatibility is critical.

Superior Washer & Gasket Corp manufactures polypropylene washers in standard and custom sizes with ISO 9001:2015 certified quality assurance. Our plastic washer capabilities include polypropylene, polyethylene, nylon, and PTFE in a full range of sizes-all produced in the U.S.A. to your specifications.

  • Broad chemical resistance to acids, bases, and solvents
  • Lightweight and cost-effective plastic washer option
  • Standard and custom polypropylene washer sizes
  • ISO 9001:2015 certified quality control
  • Made in the U.S.A.

Showing 1–36 of 36 products

SKU ID OD Thickness Material ID TOL OD TOL Quantity

390-10-010

ID 0.09
OD 0.187
Thickness 0.01
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-11-016

ID 0.107
OD 0.246
Thickness 0.016
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-12-010

ID 0.167
OD 0.28
Thickness 0.01
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-13-032

ID 0.172
OD 0.281
Thickness 0.032
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-14-010

ID 0.188
OD 0.29
Thickness 0.01
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-15-046

ID 0.145
OD 0.309
Thickness 0.046
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-16-020

ID 0.175
OD 0.309
Thickness 0.02
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-17-045

ID 0.144
OD 0.312
Thickness 0.045
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-18-025

ID 0.234
OD 0.37
Thickness 0.025
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-19-010

ID 0.104
OD 0.397
Thickness 0.01
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-20-031

ID 0.253
OD 0.436
Thickness 0.031
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-21-060

ID 0.258
OD 0.467
Thickness 0.06
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-22-015

ID 0.234
OD 0.496
Thickness 0.015
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-23-031

ID 0.201
OD 0.498
Thickness 0.031
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-24-060

ID 0.187
OD 0.51
Thickness 0.06
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-25-031

ID 0.297
OD 0.532
Thickness 0.031
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-26-031

ID 0.145
OD 0.56
Thickness 0.031
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-27-063

ID 0.192
OD 0.624
Thickness 0.063
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-28-062

ID 0.518
OD 0.684
Thickness 0.062
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-29-031

ID 0.277
OD 0.75
Thickness 0.031
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-30-061

ID 0.121
OD 0.752
Thickness 0.061
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-31-062

ID 0.271
OD 0.753
Thickness 0.062
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-32-062

ID 0.486
OD 0.769
Thickness 0.062
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-33-031

ID 0.45
OD 0.781
Thickness 0.031
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-34-030

ID 0.56
OD 0.821
Thickness 0.03
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-35-063

ID 0.387
OD 0.874
Thickness 0.063
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-36-062

ID 0.755
OD 0.875
Thickness 0.062
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-37-062

ID 0.968
OD 1.144
Thickness 0.062
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-38-010

ID 0.696
OD 1.25
Thickness 0.01
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-39-060

ID 0.311
OD 1.254
Thickness 0.06
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-40-015

ID 1.186
OD 1.373
Thickness 0.015
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-41-063

ID 0.314
OD 1.5
Thickness 0.063
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-42-045

ID 1.342
OD 1.558
Thickness 0.045
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-43-062

ID 1.026
OD 1.816
Thickness 0.062
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-44-064

ID 0.875
OD 2.0
Thickness 0.064
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

390-46-061

ID 0.395
OD 1.005
Thickness 0.061
Material Polypropylene
ID TOL +-.005
OD TOL +-.005
Quantity

Polypropylene Flat Washer Frequently Asked Questions

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

What are polypropylene flat washers?
Polypropylene flat washers are manufactured from polypropylene (PP), a lightweight thermoplastic with excellent chemical resistance, good fatigue resistance, and FDA compliance for food-contact applications. Polypropylene has one of the lowest densities of any structural plastic, making it a good choice for lightweight, chemically resistant washer applications.

How does polypropylene compare to nylon as a washer material?
Polypropylene has better chemical resistance than nylon, particularly to acids, bases, and many solvents. It also absorbs virtually no moisture, giving it better dimensional stability in wet environments. Nylon has higher tensile and compressive strength and better wear resistance. For chemical resistance and moisture stability, polypropylene is preferred; for mechanical performance, nylon is typically the better choice.

What applications use polypropylene washers?
Polypropylene washers are used in chemical processing, water treatment, food and beverage equipment, laboratory fixtures, outdoor plumbing, and medical devices. Their resistance to most acids and bases, combined with FDA compliance and low cost, makes them a practical choice in these environments.

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

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

Polypropylene is one of several lightweight, chemically resistant plastics we offer. Browse the full flat washers catalog to compare all available materials.