A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6610-01-552-2151
NSN 5975-01-048-9301
NSN 6110-01-552-3299
NSN 5975-00-923-3984
NSN 6110-00-822-4411
NSN 5960-01-142-1995
NSN 5935-00-879-2450
NSN 6240-00-393-1161
NSN 6145-01-528-4181
NSN 6685-01-422-2771
NSN 6650-01-633-9147
NSN 6130-01-644-4992