A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5905-01-574-6378
NSN 5965-00-782-8920
NSN 6130-01-545-4896
NSN 5855-00-548-4742
NSN 6145-01-414-0271
NSN 5990-01-046-8530
NSN 5996-01-598-0788
NSN 6130-01-438-8569
NSN 4140-01-411-1936
NSN 5999-01-536-8713
NSN 5935-01-567-1441
NSN 6150-01-328-9624