Bolt size exhaust manifold to pipe???

[sharkskinman]

Apparently is I was rolling into the garage to fix my brakes one of the bolts that holds my exhaust manifold to the exhaust pipe flange fell out somewhere I need to know what the thread size and such as for that bolt so I can just go pick up two of them instead of taking out 1 to check the size

[The Rocknrod]

http://67-72chevytrucks.com/vboard/s...d.php?t=391778
Not knowing what engine.
http://www.oreillyauto.com/site/c/se...0598/C0112.oap

[sharkskinman]

I6 250

[sharkskinman]

Neither of those tell me the actual bolt that goes through the plans into the exhaust manifold from the pipe

[cru_zn_29]

If you are learning to work on your own truck you need to learn bolt sizes it will save you a lot of time and money and wasted trips buying the wrong size.(Take a sample)

[TopFuel1966]

Put a 9/16 wrench on one of the existing boltheads. If the wrench fits the thread size is most likely 3/8 - 16. The next smaller size would be 5/16 - 18.

[sharkskinman]

I'm not Learning ****..
Just wanted a simple answer so I don't have to remove the other one to size it not links to threads that don't tell me
Thank u topfuel1966 simple and to the point , it's a 9/16 head so I'm off to the hardware store

[sharkskinman]

Grabbed a couple 3/8s. They are too big
Although the original bolts that were in it are 9/16 head they must be the ladder of the 2
Going to hardware store anyways so going to pick some up

Can use the ones I got for something else