Well, the title sums it up: the threads for the conical nib seemed to disintegrate and the nib fell off. This is a Touchdown filler, 14K conical nib. I filled the pen, and the nib looked wobbly. coming away from the feed. Then it fell off. I suppose a new section might have rectified this, but I am tired of this pen and its scratchiness, so I threw the pen away. The question is this: does this sort of thing happen commonly with these pens, nib falling off because of the threads falling apart?