Tri-Mount Button/Push-Pins for Nose Retract Rod and Steering Rod Boot Installation. Used for fastening fabric boots to metal panels inside the nose gear well. Retract Rod and Steering Rod Boots typically require 6 pins each for the installation. Earlier Retract Rod Boots are longer (for Bonanzas and Barons up to mid '73) and typically require 10 pins each for the installation. Factory Original Fasteners.