Are these re-threaders special or just normal ???

[Mohawk Dave]

Picked up at the swap meet. But they say:

"....chasers for correcting Inverted Flared Fitting that have been cross threaded."

So, are these specifically for flared tubes? and not regular nuts?

Are inverted flare fittings tapered or different from regular threads? I don't think they are... https://www.google.com/search?q=Inv...ved=0ahUKEwjxiaiXtvPLAhUjk4MKHZKIDcsQ_AUICCgC

EDIT: So that chamfer for the flare is what make them special so they bottom out on that instead of squishing the other side.

 

[T45]

the differences could be either materials or thread pitch

interesting...looks like spline drive on them?

 

[Mohawk Dave]

the differences could be either materials or thread pitch

interesting...looks like spline drive on them?

The thread pitch is normal NF according to the box. And that's just 12pt on them for a wrench or socket.

 

[plinker]

Likely made for chasing brake tube fittings and componets.

 

[joecon]

they are for brake fittings. I would like to find who makes them. So I could get a set.

 

[Ole Slewfoot]

looks to me like the bottom is concave to avoid marring the tube.
You cold make your own from a regular tap, but these will be nice to operate.

 

[LXCam]

The concave bottom looks like it's made to clean up the seat of the fitting. I have some of those types of fittings, I'll see if I can dig one up and get a picture. Btw, those are way too cool, I want some