Description
Replacement external-tooth lock washer for Pentair/Sta-Rite Dyna-Pro/Dyna-Pro E, Max-E-Pro, Max-E-Glas/Dura-Glas, and IntelliPro VS 3050 pumps (U43-21SSZ). It bites into the mating surface to keep pump screws from backing out under vibration. OEM 8 star washer for use where specified on the pump assembly hardware.
