Caliper bolt sizes

[Weelawser]

Folks,

Thought as I was replacing discs, front & rear, pads, refurbing calipers I would replace all the bolts etc
I get this info from real OEM:
Front: 3 Collar screw M12X1,5X32 ZNS3 4 34116772428 $1.85
Rear: 3 Collar screw, micro-encapsulated M10X26,5 4 34203414763 $1.32

However there seems to be differences on autodoc and I notice on here there appears to be different opinions also.
Bit lost as to what I should buy

2007 E85 3.0 Si

 

[Rockhopper]

Maybe the confusion is that the bolt size (M12x1 for example) is the thread size and pitch and not the head size (or the size of socket you need to undo it).