A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-345-9488
NSN 6220-01-065-1387
NSN 6220-00-589-4524
NSN 5990-00-155-2306
NSN 5975-01-499-2690
NSN 5965-00-820-0469
NSN 2925-00-660-8131
NSN 5910-00-975-2121
NSN 5895-01-076-4204
NSN 5998-01-274-9628
NSN 6220-00-269-4556
NSN 6145-01-463-3965