A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-494-2337
NSN 6220-01-564-0094
NSN 5945-00-272-8958
NSN 6105-00-921-8635
NSN 6105-00-390-6223
NSN 5990-00-081-1266
NSN 5999-01-460-0660
NSN 5985-01-146-3647
NSN 6650-00-532-8125
NSN 5985-01-156-8087
NSN 6135-01-322-4655
NSN 5998-01-212-4498