A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5996-00-505-1141
NSN 6610-00-211-3475
NSN 5996-01-467-2177
NSN 6150-00-153-9361
NSN 5950-01-515-4939
NSN 6150-01-021-4995
NSN 2925-01-302-3098
NSN 5965-01-465-4370
NSN 5910-01-530-1732
NSN 5975-01-357-5941
NSN 5965-01-541-9336
NSN 6105-01-023-2144