WW-P-491 (CANCELLATION), FEDERAL SPECIFICATION: PIPE FITTING, CAST IRON, (THREADED) DRAINAGE (30-MAR-1983) [S/S BY ANSI-B16.12, MS90522, MS90523, MS90524, MS90525, MS90526, MS90527 & MS90528]
WW-P-491 (NOTICE-1), FEDERAL SPECIFICATION: PIPE FITTING, CAST IRON, (THREADED) DRAINAGE (30-MAR-1983) [S/S BY ANSI-B16.12, MS90522, MS90523, MS90524, MS90525, MS90526, MS90527 & MS90528].
WW-P-491
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