A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5915-01-202-0184
NSN 5855-00-256-5562
NSN 6105-00-405-2343
NSN 5895-01-133-8199
NSN 6610-01-372-9248
NSN 5910-01-525-6942
NSN 5945-01-481-3701
NSN 6150-01-558-3847
NSN 6105-01-348-9673
NSN 5975-01-224-4017
NSN 6110-01-458-4372
NSN 5905-01-442-8338