The problem with pins is you need to allow for clearance. A .1250 pin will
not fit into a .1250 hole. It will fit into a .1255/.126 hole but not a
..1250 hole. Last place I worked had a hard time understanding this concept.
Air gauges are the most accurate and fastest way to check small holes.

"surftom" wrote in message
...
How do I *accurately* (n.nnnn) measure very small hole diameters?

I can poke them with a numbered drill but that would only get me close by
"feel" and only if the hole was a standard size. e.g. measureing a .0431
hole is kind of hard with a vernier or mic

No real reason - enquiring minds just want to know

Tom