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 5975-01-085-1081
NSN 5945-00-539-3043
NSN 5990-00-900-4459
NSN 5920-00-012-2000
NSN 6220-01-126-7693
NSN 5855-01-100-3272
NSN 5910-01-373-4845
NSN 6220-00-141-6150
NSN 6150-01-255-8183
NSN 5905-00-992-0307
NSN 5925-00-218-4933
NSN 2925-01-206-7948