MIL-I-20037A, MILITARY SPECIFICATION: INDICATORS, SIGHT, LIQUID LEVEL, DIRECT/INDIRECT READING, TUBULAR GLASS/PLASTIC (17-APR-1956) [S/S BY ASTM F2045]

MIL-I-20037A, MILITARY SPECIFICATION: INDICATORS, SIGHT, LIQUID LEVEL, DIRECT/INDIRECT READING, TUBULAR GLASS/PLASTIC (17-APR-1956) [S/S BY ASTM F2045]., This specification covers sight liquid level indicators of the direct and indirect reading type having tubular glass, clear polycarbonate or rigid polyvinyl chloride (PVC).