Front Brush Guard bolt sizes (mounting hardware)

[JOHNNY H2]

Hey everyone,

I am fairly new to the hummer scene, but not new to the auto world. I have recently purchased a 2006 H2 SUT and i wanted to ensure that i had the proper bolt sizes for mounting a front brush guard. The standard factory hardware that was supposed to be set in place is no longer there, but open holes where the bolts used to be (previous owner might have sold brush guard and necessary hardware)

If anyone has a diagram or knows of the proper bolt sizes (depth and mm size) for the upper mounting and lower mounting to the OEM double brush guard please advise

Thank you