A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-146-9209
NSN 6620-01-250-1692
NSN 5930-00-617-3687
NSN 6685-01-337-5657
NSN 6105-00-450-2167
NSN 5835-00-289-9080
NSN 5985-00-229-8016
NSN 5965-00-230-4162
NSN 5975-00-481-3681
NSN 5915-01-363-9524
NSN 5975-01-099-1708
NSN 5895-00-450-4969