Water pump pulley bolt size?

[turbobooster]

I'd like to know the exact thread count or what kinda bolts is used to hold the water pump pulley to the water pump ? It's 4 small bolts the go into it Im not sure if they are 5/16x24 or M8x1.0

 

[novaderrik]

they are metric, i believe.. take one to the hardware store and see what size nut fits it.

 

[turbobooster]

Actually that's exactly what I did, they even had 2 sets of thread or bolt checkers on the first chart it wouldnt go into the M8x1.0 but it went into the 5/16x24 but kinda loose so I checked on the other chart they had and it was the opposite of the first chart so Kinda confused here it's hard to tell on those things sometimes they get all jacked up from people forcing bolts or nuts that don't fit and crossthread them I thought maybe someone would know for sure

 

[Nick Micale]

On a stock GN water pump the bolts are 5/16x24 for the pulley.

 

[turbobooster]

Thanx