Approx 0.609 in. Lg, 3.500 in. Id, 4.188 in. Od, w/marking open, lock, used on flying outfit, high altitude part number a/p22s6a
Classification: Military wearing apparel of all types and materials, including footwear and headwear
NSN 6645-00-246-4934
NSN 6110-01-354-7515
NSN 5960-01-196-3344
NSN 5915-00-553-8755
NSN 6105-01-521-3937
NSN 6240-01-169-1686
NSN 5895-00-401-9659
NSN 5905-01-149-2977
NSN 6320-01-448-6265
NSN 6645-01-394-5149
NSN 5985-01-579-3450
NSN 5925-01-423-7803