MS51840C (NOTICE 2), MILITARY STANDARD: PLUG, MACHINE THREAD, O-RING (28 JAN 1997)

MS51840C (NOTICE 2), MILITARY STANDARD: PLUG, MACHINE THREAD, O-RING (28 JAN 1997)., This notice should be filed in front of MS51840C dated 21 April 1983. MS51840C is inactive for new design and is no longer used except for replacement purposes.