A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5925-01-609-7189
NSN 2925-00-172-9264
NSN 5935-01-659-5767
NSN 5950-00-278-1068
NSN 5999-00-209-9277
NSN 5910-01-630-2783
NSN 6240-01-147-5424
NSN 5996-00-878-0273
NSN 5855-00-337-3679
NSN 7035-00-360-2008
NSN 5996-01-400-3558
NSN 6220-01-442-2231