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 5990-01-426-7350
NSN 5945-00-281-4578
NSN 5930-01-444-1380
NSN 5975-01-106-2941
NSN 5975-01-281-3062
NSN 5975-01-265-0568
NSN 2925-01-633-4048
NSN 5920-01-010-3293
NSN 6320-00-389-4756
NSN 6620-01-528-6076
NSN 5910-00-385-1149
NSN 6685-01-323-5272