A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-151-0676
NSN 5915-00-530-5067
NSN 5945-01-466-7920
NSN 5910-01-584-9271
NSN 5950-01-437-6045
NSN 5990-01-440-7135
NSN 5998-01-429-0322
NSN 5985-01-039-5419
NSN 6645-00-356-5705
NSN 5835-01-416-6455
NSN 6650-01-544-9137
NSN 6645-01-573-2536