A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6645-01-364-0867
NSN 5895-01-472-7799
NSN 6320-01-039-5891
NSN 5996-01-513-8390
NSN 6130-01-220-4777
NSN 5935-00-762-7371
NSN 5975-00-081-2171
NSN 5950-00-729-0021
NSN 6685-01-444-2235
NSN 5915-00-624-0168
NSN 5998-01-503-9833
NSN 5895-01-055-7677