A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-599-2491
NSN 5965-01-441-9505
NSN 5915-01-357-7067
NSN 5950-00-945-9046
NSN 5910-01-470-8625
NSN 5960-01-406-4136
NSN 5945-01-440-7646
NSN 5910-01-232-1254
NSN 5895-01-210-0159
NSN 5920-01-547-4766
NSN 5960-01-649-1341
NSN 5855-00-433-2377