A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-01-519-9250
NSN 5960-00-955-0012
NSN 6130-01-330-1147
NSN 5835-01-227-2318
NSN 6135-01-303-0295
NSN 5935-00-383-8427
NSN 5855-00-221-9435
NSN 5945-00-010-6774
NSN 4140-01-442-8120
NSN 6610-01-435-5425
NSN 6145-00-511-9705
NSN 5999-00-445-6255