L-M-530B, FEDERAL SPECIFICATION: MOLDING PLASTIC, POLYVINYL CHLORIDE, RIGID (14-SEP-1961) [S/S BY L-P-1035]
L-M-530B, FEDERAL SPECIFICATION: MOLDING PLASTIC, POLYVINYL CHLORIDE, RIGID (14-SEP-1961) [S/S BY L-P-1035]., This specification covers the requirements for rigid polyvinyl molding and extruding compounds (see 6.1).