C276 and Titanium Bolts for NaOCl Bleach 

Q: I’m looking for replacements for m6 SS bolts on the head of a pump that pumps 12.5% NaOCl (bleach or sodium hypochlorite).  The bolts tend to loosen over time and the bleach weeps out and destroys the A4 SS bolts. The operating temperature is about 80-90 F most of the year – so a little warmer than room temp.

Do you have a suitable replacement for them?  They are M6 socket heads.

A: For sodium hypochlorite it’s definitely worth replacing the A4 bolts (316SS,) as they do not have a chance in that environment.  The two best materials are titanium grade 2 bolts and Hastelloy C276 bolts. Both are excellent in chloride environments.

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