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 5920-00-515-3617
NSN 5910-00-637-2609
NSN 6645-01-287-9969
NSN 5998-00-233-6401
NSN 5905-00-638-6776
NSN 5990-00-557-3672
NSN 5965-01-003-2641
NSN 6685-00-003-1267
NSN 5999-00-189-7500
NSN 6135-01-033-3213
NSN 5960-01-201-6316
NSN 5925-00-854-6752