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 6645-01-310-2949
NSN 5855-01-644-0445
NSN 5998-00-288-5533
NSN 5895-01-529-5809
NSN 5950-00-690-3475
NSN 6150-01-112-0391
NSN 5930-00-681-9267
NSN 5835-00-466-8544
NSN 2925-00-406-4381
NSN 5975-00-723-0390
NSN 5925-01-532-4399
NSN 6130-01-605-0942