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 5925-01-418-3314
NSN 5920-01-281-7354
NSN 4140-00-283-6843
NSN 6685-01-326-6377
NSN 6620-01-142-8494
NSN 5999-01-136-4177
NSN 6145-00-135-0018
NSN 5835-01-564-5575
NSN 6220-01-004-8909
NSN 6145-01-075-1042
NSN 6645-01-445-5235
NSN 6610-00-553-5103