The ring has a diameter of 1.2500 inches
NSN 5990-01-021-3665
NSN 5925-00-734-1441
NSN 5835-00-523-0736
NSN 6610-00-614-7943
NSN 6650-01-232-4965
NSN 6105-01-599-5240
NSN 6220-01-109-7330
NSN 6110-01-433-3225
NSN 5999-01-658-8871
NSN 5905-00-289-1665
NSN 5960-01-310-3863
NSN 5960-01-047-4326