A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-195-0237
NSN 6320-01-304-3639
NSN 6220-00-964-1042
NSN 5999-01-624-7142
NSN 5855-01-530-1139
NSN 5965-01-615-1270
NSN 6105-01-560-7241
NSN 6130-01-056-7367
NSN 5965-01-315-3112
NSN 5960-01-438-0245
NSN 6130-01-355-6086
NSN 5965-01-633-8849