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 5999-01-137-8753
NSN 6610-01-097-5073
NSN 6620-01-470-1058
NSN 5996-00-535-5889
NSN 5990-01-620-8768
NSN 5990-00-162-7273
NSN 5905-01-300-3683
NSN 5935-01-198-0282
NSN 6685-01-477-9516
NSN 5855-01-100-3272
NSN 6135-01-653-6113
NSN 5920-01-616-6431