A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-00-789-1884
NSN 5950-00-106-0907
NSN 5835-01-182-1966
NSN 6130-00-220-3068
NSN 6320-00-224-1852
NSN 6620-00-472-5146
NSN 6150-01-358-5030
NSN 5855-01-078-4180
NSN 6320-00-270-8222
NSN 6650-01-139-0022
NSN 6105-01-552-0102
NSN 5975-01-156-4544