US Seal Shaft Seal [PS-3960 5/8" Buna Carbon] (PS-3960) is a replacement pump shaft seal from US Seal Manufacturing, designed for pool and spa pump service where a worn seal can lead to water intrusion, dripping, or reduced equipment reliability. This part is intended for repair situations where the existing seal specification and part number match the pump being serviced. The PS-3960 5/8" Buna Carbon configuration helps restore the seal between the motor side and wet end side of compatible pump assemblies. Replacing a damaged or aging shaft seal is an important step when rebuilding a pump, replacing a motor, or addressing leaks around the seal plate area. The PS-3960 part number makes it easier to verify the correct component before installation. Replacement shaft seal for compatible pool and spa pump repairs Useful when servicing leaks near the pump seal plate or motor shaft area Designed for applications matching the listed shaft size and material specification Helps support dependable pump operation after wet-end service Match part number PS-3960 and pump model requirements before ordering
![US Seal Shaft Seal [PS-3960 5/8" Buna Carbon] (PS-3960)](https://cdn.shopify.com/s/files/1/1751/9347/files/35-426-1560_XL.jpg?v=1777962277&width=480)
