Deburr the holes and edges of bath parts, prime if/as desired, then rivet them together using the rivets
Secure the Spinner Back Plate Assembly and the S-603 Spinner Front Plate to the propeller hub. The spacers and hardware used to secure the Spinner Back Plate Assembly are supplied with the propeller. The four bolts used to secure the spinner front plate need to be safety wired when they are permanently installed. Torque according to the propeller manufacturers instructions.