Thread Galling and Materials

Google Anti-Sieze Compound

Anti seize compounds are fine for reducing galling.

But, galling and cross threading are two different things. No amount of anti-seize will prevent cross threading, as that is caused by the person starting the threads in the first place.

I agree & thanks!

Considering that the relevant geometries are correct, certain fastener materials and combinations thereof are more conducive to galling than others. Speed of assembly can sometimes play a role too. For example, make sure that you slow down when tightening stainless fasteners.

Galling is particularly troublesome with "fitted" bolts. I've often seen otherwise well-trained individuals feel that they were doing a good job by using a light rubber mallet to "help" a fitted bolt into its respective hole .

The problem with this is that there was a reason why the bolt didn't go in easily. Even the slightest amount of material picked-up while the bolt is "helped" into the hole will set the stage for disaster. Subsequent turning of the bolt in the bore will likely turn an ugly situation into a horrendous one. Keep the mallets, hammers, pipe wrenches, and cheater bars far, far away during installation. Do not apply torque until the bolt is fully into the hole. Unless one is working with a blind hole, make sure that the bolt does not turn when torquing the nut.

Remember: If you feel that you need "help" to get a fitted bolt in, address the problem before you start beating'n bashing, regardless of how "careful" you intend to be!