A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-01-177-4848
NSN 5895-01-577-8738
NSN 6620-01-174-8416
NSN 5985-01-502-9782
NSN 5985-00-888-8714
NSN 6110-01-433-2694
NSN 5975-01-024-3950
NSN 5998-01-565-0420
NSN 6105-01-523-0715
NSN 6645-00-975-2103
NSN 7035-01-155-0153
NSN 6620-00-473-3692