Rainbow D3A, D2A, D2, and D Separator Nut (Bolt)
Original factory screw (bolt) for the older model D3A, D2A, D2, and D motor design.
Works with the female type armatures found on the above original motors. If your motor has male threads on the end of the armature, then this is NOT the correct part. You need to order an H524 or an H555 separator nut.