HH-I-521F, FEDERAL SPECIFICATION: INSULATION BLANKETS, THERMAL (MINERAL FIBER, FOR AMBIENT TEMPERATURES) (04-SEP-1980] [S/S BY ASTM-C665]

HH-I-521F, FEDERAL SPECIFICATION: INSULATION BLANKETS, THERMAL (MINERAL FIBER, FOR AMBIENT TEMPERATURES) (04-SEP-1980] [S/S BY ASTM-C665]., This specification covers mineral fiber thermal insulation blankets for use in housing and other framed biuldings at ambient temperatures.