The ring has a diameter of 1.2500 inches
NSN 5975-01-162-3215
NSN 5895-01-050-8909
NSN 5985-01-201-9578
NSN 5990-00-722-1854
NSN 6220-01-381-1074
NSN 5998-00-622-7684
NSN 5925-01-507-1039
NSN 5996-01-323-6008
NSN 4140-00-327-5445
NSN 5925-00-196-3997
NSN 6240-01-525-4275
NSN 6320-01-202-8761