What type of nut to use for exhaust clamp?

[belfert]

I discovered today that the nut on the exhaust clamp on the turbo had fallen off.  What type of nut should I replace it with?

I suspect a nylon lock nut would melt.  Should I use an all metal lock nut?  It is fine thread so that may complicate things.

[NJT 5573]

Brian,

The best at this piont would probably be to get a couple of fine thread stainless nuts and double nut it. I have fought some of the locking nuts on and off. You will be OK with the double nut deal and you can get them on and off real easy.

Larry

[Ray D]

Exhaust nuts should be brass

Ray D

[gus]

Ray,

Brass is good for exhaust manifold studs but for clamps the metal lock nut is much better.

Brass cannot be tightened very much and clamps need a lot of torque compared to studs.

Another alternate is a drilled end clamp bolt and castle nut/cotter pin.