On 01/12/2011 05:43, William Wilson wrote:
> In imperial units the 2.5mm screw would be a 3/32 inch diameter screw
> with 32 threads per inch and 3/16" long.
>
> Metric equivalent is  M2.5x0.45 4.5mm long

Thanks, that's very helpful. So the 32 is tpi and the 3/16" is length?
Trouble is my PCB holes are the recommended 2.5mm, so I'll need a bit=20
smaller I guess. I'll get the number 2 imperial which by my calculations=20
is 2.18mm.
Couple more questions:
How can we be sure of the diameter when only given 32 x 3/16" for the=20
screw size?
What standard does this comply with?
Is there any decent reference out there that explains this?

--=20
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