The ring has a diameter of 1.2500 inches
NSN 5990-01-647-8574
NSN 5855-01-222-1242
NSN 6130-01-035-5584
NSN 5950-00-472-5661
NSN 6685-01-157-5540
NSN 6240-01-346-5550
NSN 5945-01-094-6343
NSN 6130-00-528-7838
NSN 5925-01-425-0959
NSN 5965-01-063-6115
NSN 2925-01-163-6716
NSN 5999-00-155-8066