A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5920-01-278-6508
NSN 6145-01-601-7211
NSN 5990-00-920-2894
NSN 5915-00-410-8874
NSN 5930-01-432-1143
NSN 5905-01-056-3338
NSN 6105-01-355-3535
NSN 5945-01-081-7407
NSN 5855-00-310-2740
NSN 5996-01-238-1041
NSN 6135-00-134-6648
NSN 6620-00-955-6122