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 6145-00-907-1180
NSN 6145-01-502-9150
NSN 5925-00-156-4044
NSN 6145-01-634-0388
NSN 5950-01-266-6673
NSN 2925-01-516-5113
NSN 5895-01-197-7401
NSN 6685-01-448-9371
NSN 6130-00-948-1988
NSN 6240-01-622-6534
NSN 5999-01-542-0325
NSN 6645-01-025-1002