child res bolt

[ducky]

Hi Guys

I have had used the search function and cant find answer that way so thought id ask.

Does anyone know what thread and pitch the child res bolt hole is as I am having trouble getting a bolt to suit it as m8 seems to cross thread and m6 is far to small.

any help would be greatly appreciated.

[mattwhite]

5/16 unc. Yes it's imperial. That's the standard.

[ashh]

Edit- read op post wrong