A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5950-00-932-3232
NSN 5895-01-272-9740
NSN 5835-01-325-5677
NSN 5895-00-112-8767
NSN 4140-01-335-7736
NSN 5950-01-451-0802
NSN 5905-01-359-5469
NSN 5998-01-535-1171
NSN 5945-01-576-5936
NSN 5945-01-377-2415
NSN 5996-01-018-3512
NSN 5985-01-447-4188