A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-223-1346
NSN 5835-01-488-6678
NSN 5855-01-562-2005
NSN 5960-01-089-8155
NSN 7035-01-235-2295
NSN 6320-01-544-6447
NSN 5835-00-523-0736
NSN 5945-01-552-6438
NSN 5996-00-267-1139
NSN 6645-00-970-5739
NSN 5996-00-720-3064
NSN 6645-00-679-8203