A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5920-01-426-6666
NSN 6105-00-223-3719
NSN 6135-01-296-1860
NSN 5835-01-088-4676
NSN 6145-00-896-1893
NSN 5930-00-900-6614
NSN 6240-01-343-9093
NSN 6685-01-359-8716
NSN 5985-00-279-2393
NSN 6150-01-445-9942
NSN 5950-01-363-8512
NSN 5905-01-349-8138