A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-604-9552
NSN 7035-01-113-6492
NSN 6240-00-899-6990
NSN 5945-01-467-2242
NSN 6650-00-006-9650
NSN 5960-00-315-0358
NSN 6610-01-348-5719
NSN 5945-01-216-7953
NSN 6650-01-426-4253
NSN 5915-01-567-8298
NSN 5985-00-248-4978
NSN 5996-01-476-7550