Locking with groove
NSN 6240-01-652-8624
NSN 6150-00-111-3528
NSN 5895-01-038-4123
NSN 5925-01-348-7826
NSN 5920-01-076-4705
NSN 6150-01-045-4620
NSN 5920-00-904-1549
NSN 5925-01-103-8322
NSN 6110-00-156-0430
NSN 5990-00-389-0554
NSN 5915-01-276-7225
NSN 5990-00-378-1449