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 6145-01-155-5277
NSN 5985-01-537-6533
NSN 6685-01-019-3445
NSN 5920-01-223-0747
NSN 5920-01-085-5490
NSN 6650-01-171-6909
NSN 6620-00-124-9515
NSN 5965-01-620-3954
NSN 6105-01-233-9603
NSN 5855-01-414-6265
NSN 5910-01-448-0956
NSN 6685-01-092-5819