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 5990-00-419-7584
NSN 5950-00-814-3356
NSN 5905-00-960-6551
NSN 5960-01-056-6705
NSN 6610-00-885-1270
NSN 5998-01-021-9123
NSN 5998-00-816-9752
NSN 6240-00-054-3661
NSN 6685-01-504-1292
NSN 6145-01-119-6689
NSN 5925-01-032-5389
NSN 6320-00-779-5923