The difference between the part numbers is that the markings are different
NSN 4140-01-446-2664
NSN 4140-00-943-7434
NSN 6650-01-334-5789
NSN 5999-01-563-7071
NSN 6610-01-487-8879
NSN 5960-01-449-1310
NSN 5998-01-605-4063
NSN 6650-00-018-7298
NSN 5895-01-176-1237
NSN 6145-00-374-3826
NSN 6220-01-071-6096
NSN 6130-01-123-0371
Last Updated: 05/10/2024