Locking with groove
NSN 5910-01-249-6443
NSN 6610-01-374-6505
NSN 5975-01-204-6005
NSN 5985-01-290-5927
NSN 6650-00-716-7628
NSN 6620-01-361-8685
NSN 5998-00-552-6703
NSN 5930-00-646-5232
NSN 5935-01-258-1998
NSN 6650-01-206-3584
NSN 6105-01-488-7923
NSN 5895-01-106-2640