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 6105-01-594-0632
NSN 5990-00-838-1082
NSN 6650-00-071-0612
NSN 5925-01-038-1569
NSN 5999-01-398-8299
NSN 5895-00-008-5256
NSN 5945-00-679-9327
NSN 5905-00-196-2855
NSN 5920-01-516-0467
NSN 5950-00-893-3288
NSN 5935-00-922-5520
NSN 5905-01-401-5325