Carbon Steel studs and Stainless Steel nuts for manhole covers

Asked by phamus 1 year, 11 months ago | 1 Answers

Does anyone experience the use of stainless steel nuts on carbon steel studs for manhole covers on offshore facilities? Stud threads stripped and cannot be repaired since they were welded to avoid rotation.

1 Answer

mobassey 1 year, 11 months ago
You should use brass nuts on stainless steel studs for all manhole covers.  Brass nut material is softer than stainless steel studs and would fail before permanent stud would.