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 6320-01-317-7312
NSN 6610-01-547-4728
NSN 2925-01-577-0004
NSN 5835-01-026-0670
NSN 7035-00-337-8745
NSN 5996-00-371-9102
NSN 5945-00-921-4267
NSN 4140-00-122-6422
NSN 6645-01-052-8331
NSN 5905-01-395-0053
NSN 5998-01-502-6954
NSN 2925-01-442-7812