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
NSN 5975-01-018-8892
NSN 6240-01-401-5340
NSN 6105-00-156-4312
NSN 6110-01-212-4341
NSN 6650-00-372-6035
NSN 7035-00-870-0290
NSN 6130-01-425-1459
NSN 5925-00-057-5407
NSN 6645-00-551-8291
NSN 5915-01-026-1918
NSN 5925-01-415-3084