A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-753-8756
NSN 5999-01-484-6915
NSN 5945-01-468-7349
NSN 5985-00-906-2035
NSN 6645-01-162-7559
NSN 6150-00-851-5136
NSN 4140-00-150-8265
NSN 6320-01-227-2648
NSN 6135-00-577-8429
NSN 5965-01-339-8139
NSN 5965-00-578-8931
NSN 6105-00-960-0072