A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5950-00-639-9675
NSN 5965-01-170-5705
NSN 6150-01-280-2052
NSN 5835-00-853-7785
NSN 5930-00-526-0543
NSN 5950-00-528-2573
NSN 5945-01-277-6063
NSN 5960-00-001-4686
NSN 6110-01-245-0334
NSN 5960-01-144-9183
NSN 6130-01-390-7031
NSN 6240-01-577-7170