Nut & Bolt Thread Checker

Identify Metric and SAE fasteners

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About Nut & Bolt Thread Checker

Acting as a digital thread gauge wall chart, the Nut & Bolt Thread Checker takes the guesswork out of machining and hardware matching. Input your measured diameter and pitch/TPI to instantly identify standard ISO Metric or Imperial SAE threads (like M8x1.25 or 1/4-20). It also provides the exact 75% tap drill bits and close-clearance drill sizes required for your project.

Nut & Bolt Thread Checker Features

  • Metric (ISO) and SAE (Imperial) support
  • Tap drill bit recommendations
  • Identifies custom vs. standard threads

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