A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 4140-00-964-8623
NSN 5835-01-423-9203
NSN 5990-01-227-0660
NSN 5990-01-242-4493
NSN 5975-01-485-3314
NSN 5975-01-316-0441
NSN 6620-01-504-5756
NSN 6105-01-303-7530
NSN 6320-00-313-9114
NSN 5965-00-189-9394
NSN 5910-01-290-3769
NSN 5905-01-585-0433