A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6110-00-363-3974
NSN 5935-00-124-5263
NSN 6610-00-935-7131
NSN 6610-01-327-3187
NSN 5920-01-173-2598
NSN 5930-00-644-4476
NSN 5835-01-595-4099
NSN 6620-00-485-4136
NSN 5920-01-335-6347
NSN 5945-00-832-6879
NSN 6645-01-433-6999
NSN 5965-01-105-1645