The item named by the manufacturer is a stop assembly
NSN 5996-01-219-6675
NSN 6610-01-359-0008
NSN 5835-01-207-6612
NSN 6610-01-356-7471
NSN 5905-01-231-0790
NSN 6110-01-465-7511
NSN 6150-01-581-6779
NSN 6240-01-082-5552
NSN 5945-00-678-2859
NSN 5905-01-138-2218
NSN 6150-00-941-0667
NSN 6145-01-269-5208