A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6320-01-585-8468
NSN 5975-01-530-6837
NSN 5965-00-899-0453
NSN 5975-00-839-7304
NSN 6110-01-219-7041
NSN 6220-01-324-0343
NSN 6105-01-007-6115
NSN 6220-01-655-5802
NSN 6650-01-023-2698
NSN 6135-00-461-3590
NSN 6240-01-112-1120
NSN 5895-01-196-8086