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 6135-01-142-2417
NSN 7035-01-232-7263
NSN 6620-01-653-7644
NSN 6650-01-006-3487
NSN 5965-01-551-7393
NSN 6685-01-500-4808
NSN 5996-00-792-9758
NSN 6685-00-497-0561
NSN 6240-00-304-7015
NSN 5905-00-146-6175
NSN 5930-01-492-6381
NSN 5996-01-148-1252