Panasonic N510069637AA 12-Head Nozzle Shaft for CM602 SMT Machine The Panasonic N510069637AA nozzle shaft , also commonly described as a ball spline or SMT shaft , is a precision mechanical component used in the CM602 H12 / 12-nozzle placement head . Its primary role is to support controlled linear movement of the nozzle mechanism while maintaining stable alignment during repetitive component pickup and placement operations. Published parts references specifically associate