A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6110-01-489-5482
NSN 6110-01-139-4646
NSN 5925-00-023-4154
NSN 6145-01-425-3373
NSN 6610-00-236-7175
NSN 5950-01-341-5722
NSN 6145-01-299-4783
NSN 6320-01-652-3806
NSN 6145-00-499-1131
NSN 6240-00-010-7334
NSN 6130-01-289-4801
NSN 7035-01-350-4247