Hartwell supports the civil and military helicopter market with both airframe and engine related products. Airframe products include pilot, co-pilot, passenger, and cargo door handles, as well as various latches for maintenance access. Engine products often include hook and pin latches specially developed to withstand helicopter vibration spectrums, along with the temperature and load environment experienced by engine cowlings. Major customers in this market segment include: Bell, Boeing, Leonardo, Airbus Helicopter, and Sikorsky.