I have doing loads of Stub Acme threads,
1st - make sure your tips are Stub ACME and not ACME - same with gage maker rollers, i seem to remember that they have a recall on some of these.
2nd - are your threads standard ? - our Oil based customer states S.A threads but thier spec. is slightly wider than the tips we get.
we use ISCAR and GLENDOWER
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