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 6150-01-298-3802
NSN 6135-00-368-5578
NSN 5998-00-201-0230
NSN 5985-00-182-7353
NSN 6130-01-452-8737
NSN 5965-01-005-0611
NSN 5975-01-432-2591
NSN 5910-00-611-4945
NSN 6110-00-337-0858
NSN 6145-01-273-0076
NSN 5999-01-391-5646
NSN 5990-00-007-7833