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 4140-00-755-6814
NSN 6645-01-565-6973
NSN 2925-01-327-3069
NSN 6135-01-497-4516
NSN 6240-01-234-7893
NSN 6610-01-030-8220
NSN 7035-00-679-9027
NSN 6145-00-286-9588
NSN 5915-00-188-9057
NSN 6220-00-131-2095
NSN 5930-01-391-5671
NSN 5965-01-422-1392