Quote Originally Posted by oley55 View Post
Mentally, I was just about "all in" on using a feeler gauge with a GO gauge to check for NO-GO until today, when I mic'ed my 30+ year old (no name) Made in the USA (and rust free) feeler gauges. The .002"=.0036", .003=.0052", .004=.004"!!!???!!! Having measured the .002 and .003, I was about convinced my cheapo Lyman 1" micrometer was having issues. That was until I measured the .004" and it was dead on. I guess the moral of this story is; "not all feeler gauges are created equal", USA made or otherwise.

So buying some high end feeler gauges to cut up to save buying a Forster NO-GO gauge for $28.50 doesn't seem quite so frugal to me now.

It would be interesting to know if +/- .002" is the acceptable standard for feeler gauges.
I say this with no source to back it up but I would think feelers should be within .000X but as unsaid I really dont know.. I have some really nice sets my dad left me, I'll mic them and see what I get

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