A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5996-01-414-4317
NSN 5996-01-391-7403
NSN 5945-00-165-0911
NSN 6110-01-060-6439
NSN 5950-01-362-6964
NSN 5999-00-269-3663
NSN 5910-01-067-7406
NSN 6685-01-024-0530
NSN 5930-01-348-6075
NSN 5985-01-212-3931
NSN 5960-01-229-6324
NSN 5996-01-542-8611