Locking with groove
NSN 5965-01-309-1084
NSN 2925-00-513-6644
NSN 5975-00-912-4785
NSN 5935-01-116-3407
NSN 5998-01-374-2588
NSN 5965-00-815-2525
NSN 5945-01-283-2938
NSN 6135-00-990-1822
NSN 6105-01-230-7024
NSN 5950-01-364-0800
NSN 6685-01-075-3732
NSN 5990-01-631-1952