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 6145-01-319-1007
NSN 5990-01-595-9441
NSN 5935-00-530-6132
NSN 5910-01-422-2324
NSN 5920-01-348-4217
NSN 5999-01-649-1451
NSN 6645-00-116-1409
NSN 5990-01-070-4627
NSN 5835-01-474-1224
NSN 5905-00-821-9294
NSN 6650-00-882-1454
NSN 5910-01-396-9276