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 5855-01-393-0774
NSN 6135-01-519-7879
NSN 5925-01-384-3402
NSN 5960-00-499-6781
NSN 5960-01-269-9073
NSN 5950-01-630-5794
NSN 5998-01-248-5016
NSN 5965-01-173-2486
NSN 5930-01-506-1444
NSN 5895-00-468-4103
NSN 6320-01-551-3553
NSN 5996-00-446-1701