An item composed of one or more materials, molded, compressed, and/or baked into a rigid covering of irregular shapes and sizes. it is designed to cover air ducts and/or air duct fittings used in air conditioning, heating, cooling, pressurizing and de-icing systems to restrict the dissipation of heat. it may completely or partially encase the item for which designed. it may be furnished with or without fillers, cement, and/or separate or attached accessories for installation, (excluding flexible air duct covering and rigid pipe and pipe fitting coverings used in construction and building materials). Excludes insulation blanket, thermal, aircraft; insulation pipe fitting covering, thermal; and insulation sleeving, thermal.
Classification: Other parts of airplanes or helicopters for use in military aircraft (excludes propellers, rotors, undercarriages, and parts thereof)
NSN 5985-01-422-9812
NSN 5910-01-441-3690
NSN 5935-01-016-2544
NSN 5965-01-506-3320
NSN 6320-01-250-0290
NSN 5985-01-090-1100
NSN 6135-01-104-3790
NSN 5996-00-105-0862
NSN 5945-01-044-5825
NSN 5930-01-456-9512
NSN 6610-01-336-2787
NSN 6220-00-783-0207