Locking with groove
NSN 5910-00-630-8041
NSN 5950-01-438-3321
NSN 5996-01-334-8675
NSN 2925-01-422-1542
NSN 6320-01-383-9979
NSN 2925-01-138-0808
NSN 7035-00-794-0792
NSN 5905-00-056-9669
NSN 5935-01-059-2456
NSN 6620-01-506-5418
NSN 5990-01-138-8981
NSN 6610-01-653-2733