A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6650-00-239-9226
NSN 5935-01-123-8144
NSN 7035-01-619-9108
NSN 6320-01-202-8761
NSN 5930-01-634-0659
NSN 5835-01-008-1003
NSN 6220-01-618-2057
NSN 5950-01-621-2907
NSN 6650-00-903-5419
NSN 5895-01-438-0215
NSN 5960-01-032-4229
NSN 5935-01-586-4371