A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6320-01-365-2701
NSN 6150-01-108-8284
NSN 6150-00-539-9812
NSN 5945-01-606-2879
NSN 6150-00-904-1701
NSN 5905-00-274-3789
NSN 6150-01-463-8872
NSN 5925-01-432-0149
NSN 5925-01-634-0664
NSN 6145-01-554-9273
NSN 5998-01-327-3498
NSN 6320-00-004-9158