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 6620-00-038-5343
NSN 6645-00-248-5434
NSN 4140-01-033-4953
NSN 5965-00-100-1291
NSN 5835-00-482-0924
NSN 5925-01-555-3106
NSN 5925-00-426-8850
NSN 5925-01-330-4491
NSN 5945-00-935-8657
NSN 5935-00-827-1149
NSN 5935-00-678-0883
NSN 2925-01-426-3410