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  1. Rich77

    Wire Insert Thread Class 3B

    Thanks for the quick response. Looks like I need to purchase a different Tap and Gauge. Useful link btrueblood [thumbsup2]
  2. Rich77

    Wire Insert Thread Class 3B

    Hello, I need to produce a threaded hole for a wire insert. The drawing states " THREAD TO SUIT 0.138-32UNC-3B INSERT" I have had conflicting advise from different tool suppliers for tap selection. One supplier has said that the tap I require is 2B class and the 3B tolerance is achieved by the...

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