A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-633-8443
NSN 5945-01-435-4909
NSN 6320-01-198-4024
NSN 5990-01-517-7848
NSN 5920-00-434-4230
NSN 6240-01-448-4273
NSN 5990-01-607-3528
NSN 4140-01-412-1566
NSN 5925-00-646-3137
NSN 5835-01-050-9509
NSN 5905-00-235-9416
NSN 5950-01-123-4296