Bennelli 90 front sight nut size?

[mortman]

Hi,
On my super 90, the nut that holds the front signt. What size, please?
Thanks,
M.

[tinman1975]

You didnt specify which model....I think both the m1 and m4 are the same though, because the meprolight night sights seem to be interchangeable on both. Regardless, it should be a 5.5mm wrench. I bought an entire 8 piece midget set at sears for like 17 bucks...hope that helps