Originally Posted by
J T CUNNINGHAM
May I suggest 'threaded inserts'?
They are similar to 'pop rivets', only instead of breaking off the mandrel, the threads within allow
the use of a machine screw or bolt. 'Pop rivet', and 'Rivnut', tools are disimilar so that a small
'kit', for each would be the way to go.
Regards,
J T
The problem with "Helicoils", "Rivnuts" and similar inserts is that they require an even bigger installation hole than drilling and tapping the current dropout hole one size larger. Dropouts are almost universally threaded M5x.8 and the next size up would be M6x1.0. If the eyelet doesn't have enough metal for an M6 hole, it certainly won't have enough to take an insert.
I agree, try reversing the bolt in the current hole and use a nut on the outside. A button head or pan head bolt will minimize the thickness on the inner face of the dropout.