NTSB alert

[M61A1]

I'd be wary of stainless steel nuts & bolts. SS is quite soft, even the good quality stuff. It is easy to strip thread on SS screws & nuts & overtorquing can shear the bolt a whole lot easier than a carbon steel bolt. I use AN hardware everywhere.

Yes, very wary, and they must absolutely be lubricated. I' had to resort to cutting a bulkhead hydraulic fitting off a 737 engine nacelle, because it was fitted unlubricated, it galled so badly, it just welded itself together halfway off.

Apologies for the multiple replies, I'm not completely up to speed with my iPad functions, don't tell FT! He'll tell me I'm old.

 

 

[metalman]

Most standard aircraft hardware is available in corrosion-resistant stainless steel of course, but it's very costly. The stainless screws that cause people dramas when inserting them into standard fasteners for the first time, would be your general Hardware store types.........Maj......

With the fabrication work I do I've got some anti gaule handy whenever I use stainless, you can do ten bolts trouble free then the next five will seize , a question Maj ,do you torque the an3 - an4 size bolts with a torque wrench or just by feel?

Matty

 

 

[pmccarthy]

High lead content nuts, such as those used on Some Rolls Royce components, are single use. They deform to fit the bolt thread.