A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6645-00-155-2398
NSN 6150-01-487-6624
NSN 5835-00-491-3834
NSN 5965-00-258-6809
NSN 6105-00-061-8694
NSN 5905-00-189-0034
NSN 6650-00-009-1427
NSN 5835-01-378-6804
NSN 6105-01-510-8848
NSN 5950-01-158-1056
NSN 5945-00-972-0626
NSN 5910-00-251-6733