A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-00-929-0458
NSN 6645-01-342-1917
NSN 5998-01-528-7918
NSN 6110-01-425-1449
NSN 5975-01-099-4695
NSN 5935-00-484-1291
NSN 5996-01-264-8463
NSN 5920-01-383-0300
NSN 6110-01-224-9736
NSN 5915-01-077-7965
NSN 5998-01-131-9453
NSN 5935-01-468-5799