Nut - Propshaft Coupling Nylok Nut 3/4-16
Some drive shaft couplings use a short, or "thin" Nylock nut to retain the coupling to the shaft, this is the Fine Thread nut, Stainless Steel. (This is a specialty nut not available at local stores)
Thread: 3/4" x 16 NF
NOTE: It is recommended to lubricate a new SS Locknut with a dab of grease before installing. (prevents galling)
Wrench Size: 1 1/16"