A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5996-01-659-9365
NSN 5930-01-605-1487
NSN 5855-01-385-8846
NSN 6240-00-607-0828
NSN 5945-00-724-7671
NSN 6150-01-312-3130
NSN 5895-01-468-5582
NSN 6240-00-988-3839
NSN 6110-01-395-1727
NSN 5999-00-185-1659
NSN 6645-01-305-8042
NSN 6610-01-193-2169