A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5985-00-188-9665
NSN 5975-01-401-5355
NSN 5999-01-379-5707
NSN 5835-00-315-3797
NSN 7035-00-104-7613
NSN 5855-01-538-7024
NSN 6110-00-402-7637
NSN 6145-01-331-2386
NSN 5998-01-015-0908
NSN 5996-01-268-1625
NSN 6240-00-226-0462
NSN 5915-00-627-4113