A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-00-156-6355
NSN 5996-00-468-1874
NSN 6610-01-434-4024
NSN 6610-01-487-3794
NSN 6150-01-242-6095
NSN 6105-01-105-8332
NSN 5920-01-207-7952
NSN 5999-00-398-1583
NSN 5998-01-006-9603
NSN 6110-00-478-9128
NSN 5975-00-153-0050
NSN 5925-01-582-4241