Bolt sizes M?
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Standard M18 is 2.5 pitch. For hole size just take the pitch away from the diameter and that will give you the drill size.
M18 X 2.5 = 15.5 hole
M18 fine is 2.0 pitch so you need a 16.0 drill
M18 X 1.5 is a common spark plug size, 16.5 drill
M18 X 1.0 is also avaliable, 17.0 drill for this.
M18 X 2.5 = 15.5 hole
M18 fine is 2.0 pitch so you need a 16.0 drill
M18 X 1.5 is a common spark plug size, 16.5 drill
M18 X 1.0 is also avaliable, 17.0 drill for this.
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No, Pitch is the measurement from peak to peak.
If you have a rule, measure over 10 pitches, if it's 25mm then you have a 2.5mm pitch!
If you have a rule, measure over 10 pitches, if it's 25mm then you have a 2.5mm pitch!
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