Triple Incorporated on the Web Triple Inc. is a manufacturer of precision components for the aerospace industry. These components include matched valves fuel systems, spindles and shafts for motors and transmissions, pistons and shoes for hydraulic pumps, and various close tolerance housings. Triple has worked in the Aerospace and Defense industry for over 50 years. Engine Fuel System Components - We invite you to view some of the places you will see our products and the applications that these products are used for.