A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-634-0388
NSN 6240-01-174-1907
NSN 5905-01-049-3896
NSN 5998-01-158-5544
NSN 5895-00-180-2225
NSN 5930-00-177-2810
NSN 5905-00-342-9311
NSN 6145-01-154-9606
NSN 5996-01-537-8338
NSN 6240-01-022-3917
NSN 5935-01-235-9605
NSN 6685-01-143-9652