Marine Shift Lever Knob
The manufacturer of a marine shift lever knob was experiencing quality issues due to stripped threads. The plastic knob had been designed with an internal thread used to mount it to the mating shift lever. This plastic thread did not provide adequate resistance to rotational torque and also introduced wear problems. Mold-in installation was not an option so any solution would have to be post-mold installed. The customer required a reusable thread that would satisfy their torque requirements and eliminate wear associated with repeated cycles of removal/installation.