Engine Bolt Sizes

[Belle427]

Does anyone know the bolt sizes that are used to bolt the accessory brackets to the heads?
Tensioner, idler etc. The one im interested in looks to be around M10 in size and 65 mm in length as i had to cut the head off to get it out.
Would also like to know what size/length bolts are needed to attach the engine to a stand.
Thanks in advance.

[Steve_D]

The bolts will be imperial so will be measure lengthwise in inches (1/4" steps)
Those bolts going into aluminium will be a coarse thread called UNC
Measure the bolt diameter and look it up on this chart. You can also count the number of threads per inch.

http://www.carbidedepot.com/formulas-tap-standard....

Steve

[Belle427]

Thanks, bolt in question checks out as a 3/8 UNC 2.5 Inches long.