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 5935-00-194-5383
NSN 6105-01-020-3558
NSN 6610-01-140-8163
NSN 6610-00-160-3315
NSN 5905-00-183-9344
NSN 5996-00-449-5112
NSN 6645-01-361-8052
NSN 5925-01-132-9120
NSN 6240-00-906-4062
NSN 6685-00-615-9904
NSN 6320-00-483-0451
NSN 6320-00-731-6134