- Flange Port O-Ring
- For use with: Sherwood Pumps 1730C, 1730C, P1730A, SW9037, Cummins Pumps 3866493, 3964765, 4003526, 5265994, 4003526, 5265996, 526599600, 5265999, 526599900, and many more.
- Manufacturer: Sherwood
- Part Number: 21525
- Also Known As: 21525-SHW, 21525SHW, Cummins 3866102, 145545