smallblock chevys usually use studs for water pump pulley. the thread size is 5/16" dia. nf (national fine thread) on the water pump flange side and 5/16" course thread on the pulley side of stud. if you use bolts you will need 5/16"NF x 3/4" long.
Type your answer here... Thread size is 5/16-24(fine) and the length will vary depending on fan and pulley thickness.
5/16 in bolt. use a 1/2 inch wrench.
size of bolt on break calliber on Chevy trailblazer
You need 54mm bore bolts for a caliper for a 1998 Chevy Prism.
9/12
3/8-16
the water pump on the Chevy astros are right behind the fan. you need to remove the fan shroud, remove the belt, then the fan. The pulley comes right off and the part behind the pulley is the water pump. It is held on by four bolts two on each side. You will not be able to see them all, but they are reachable with a deep well socket, I believe a 9/16. I could be wrong about the size though. hope that helps :)
The Allen wrench size for the front caliper slide pin bolts is 3/8".
Ther are a lot of bolts in the 95 monte, which bolts are you talking about?
They are Metric bolts, 12 or 13 millimeter I think.
15 millimeter and/or 13mm.
M12-1.50