A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-00-456-5365
NSN 5895-01-059-6142
NSN 6130-00-890-8471
NSN 6220-01-026-7260
NSN 5965-01-136-7970
NSN 5985-00-165-1945
NSN 5915-01-550-9703
NSN 6135-00-422-3967
NSN 5996-00-409-9683
NSN 6240-00-855-4518
NSN 5950-01-386-1812
NSN 5905-01-520-7378