L-P-391D, FEDERAL SPECIFICATION: PLASTIC SHEETS, RODS AND TUBING, RIGID CAST, METHACRYLATE (MULTI-APPLICATION) (19 NOV 1975) [S/S BY ASTM-D4802 AND ASTM-D5436]

L-P-391D, FEDERAL SPECIFICATION: PLASTIC SHEETS, RODS AND TUBING, RIGID CAST, METHACRYLATE (MULTI-APPLICATION) (19 NOV 1975) [S/S BY ASTM-D4802 AND ASTM-D5436]., This specification covers methacrylate sheets, rods and tubes produced by casting or machining cast blanks. This specification does not apply to heat-formed and molded or extruded shapes, or shapes made by assembling two or more pieces.