The ring has a diameter of 1.2500 inches
NSN 5945-01-488-6256
NSN 5855-00-149-0766
NSN 5945-00-116-9390
NSN 5935-01-586-4914
NSN 6650-01-446-8752
NSN 5895-00-248-7477
NSN 6650-01-207-0829
NSN 7035-00-946-2642
NSN 5835-00-013-0905
NSN 5996-00-382-9296
NSN 6135-01-444-6824
NSN 5960-00-960-6805