Used om f-4, phantom aircraft
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.
NSN 5925-01-628-3425
NSN 5996-01-645-4831
NSN 5996-00-679-1274
NSN 6220-00-236-8333
NSN 5945-01-618-8044
NSN 6135-01-415-9741
NSN 5930-01-585-8933
NSN 6240-01-463-3132
NSN 6135-00-945-0015
NSN 5835-01-581-1957
NSN 2925-01-459-8093
NSN 5975-00-075-5191