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 5915-01-529-7285
NSN 5950-00-159-8302
NSN 5990-01-312-2638
NSN 5925-01-262-2893
NSN 6110-00-951-9824
NSN 6130-01-446-7404
NSN 5998-01-406-4916
NSN 6645-01-023-8724
NSN 5996-00-615-4590
NSN 5855-01-475-4454
NSN 7035-01-542-7946
NSN 5965-01-391-1703