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 5998-01-476-7582
NSN 6650-01-123-7249
NSN 5975-00-728-3224
NSN 6645-01-076-4655
NSN 5999-00-373-9339
NSN 5999-01-597-0412
NSN 6130-01-139-7401
NSN 6110-01-575-6724
NSN 5998-01-274-3542
NSN 5999-00-938-9426
NSN 5975-01-655-0696
NSN 6650-01-570-4795