A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5965-01-534-6396
NSN 6650-00-503-9633
NSN 6130-01-550-1888
NSN 5999-00-286-6231
NSN 5998-01-062-2281
NSN 6685-01-182-0948
NSN 5996-00-360-5126
NSN 6145-01-020-9892
NSN 5960-00-759-2534
NSN 5990-00-636-4218
NSN 5920-01-034-2473
NSN 5960-00-104-2740