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 5998-01-076-8434
NSN 6145-01-324-5774
NSN 6135-01-433-2062
NSN 5920-01-298-6332
NSN 4140-01-548-2551
NSN 6150-00-136-9023
NSN 6645-00-155-2398
NSN 5975-00-399-6100
NSN 5998-01-296-2318
NSN 5996-00-578-3278
NSN 5999-01-132-9587
NSN 6650-01-159-9151