A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5910-00-201-1874
NSN 5965-01-605-3878
NSN 6650-01-102-7847
NSN 5975-00-390-3893
NSN 6220-01-313-9583
NSN 5895-00-866-7789
NSN 5855-01-562-9999
NSN 5996-01-597-1682
NSN 5998-00-399-2830
NSN 5920-00-224-1634
NSN 6320-01-578-6006
NSN 6110-01-495-4888