A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6645-01-421-5667
NSN 5965-00-256-8687
NSN 5975-01-401-5355
NSN 7035-01-576-5481
NSN 5975-01-442-6471
NSN 6320-00-937-5625
NSN 6645-01-535-7136
NSN 5965-01-576-9859
NSN 6150-01-455-2217
NSN 5998-00-803-3067
NSN 5930-00-935-4539
NSN 6135-01-537-7639