3/4-10 nc threads for 1 in. Plug
An item which sacrificially corrodes when coupled to a more noble metal in a conducting medium.
NSN 6150-01-123-3044
NSN 5855-00-189-6066
NSN 5975-00-468-6111
NSN 5996-01-390-3676
NSN 6150-01-258-1701
NSN 5920-01-492-0297
NSN 6650-01-467-2355
NSN 6110-01-290-8801
NSN 6145-01-461-9881
NSN 5996-01-544-1467
NSN 6610-00-103-1196
NSN 5895-00-008-8272