I just picked up a new 3/8 drill bit to go with the 1/4-20 rivnuts.
It's a winner. First try and it came out great. Super tight.
The rivet threads are a little sloppy, but locking the eye in place with the nut will do the trick.
Nice clean look when its done too. I'll bet you could bolt two tubes together with these. Maybe use a little blue or red thread lock.
Wish I had this when I was doing the ridge vent.
Its easy to do.
The drill bit has to be just big enough for the rivet to fit in the hole.
Drill the hole in the tube and screw a new rivet on to the puller with the arms all the way open.
Put the rivnut in the hole and close the arms.
The puller plus the rivnut so it crimps on the backside (inside) of the tube.
Unscrew the puller from the rivnut with the nob between the arms.
Done. It takes more time to drill the hole than pulling the rivnut.
I got the 37 buck puller for two reasons.
It was 12 bucks cheaper.
The replacement mandrels are easy to identify because they come in color coded boxes.
I got a spare 1/4" mandrel.
14”Rivet Nut Tool, Meterk Professional Hand Rod Rivet Gun Setter Kit with 7Metric & SAE Mandrels and 35pcs Rivnuts, Labor-Saving Design, Rugged Carrying Case