A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5965-00-170-5254
NSN 6105-01-295-9970
NSN 5999-00-480-2564
NSN 6610-00-825-5774
NSN 7035-01-352-6235
NSN 6130-00-431-8198
NSN 5855-01-119-5869
NSN 6610-01-271-1205
NSN 6320-01-054-3046
NSN 5965-00-689-1545
NSN 6240-00-172-8451
NSN 5895-01-450-3466