A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-670-7831
NSN 6130-01-175-2092
NSN 6145-01-276-3415
NSN 6135-00-777-5562
NSN 5915-01-499-9424
NSN 5999-01-516-3285
NSN 5855-01-178-1130
NSN 5950-00-199-7652
NSN 7035-00-155-9513
NSN 6150-00-182-4008
NSN 6150-00-448-0007
NSN 5905-01-359-4050