This is the vacuum wiper nut that fits CJ2A, CJ3A, CJ3B, M38 and M38A1 models. The nut also fits CJ5 and CJ6 models with the early style wiper arm and blade setup. The nut is a stepped acorn nut to hold the arm to the wiper motor.
Note: This does not fit Trico style blades.
1 Required per Vacuum Motor.