Observed arrival · 2026-10-14
What Size Drill Bit Do I Need?
A drill-bit lookup and reference for tap sizes, pipe threads, and screw pilot holes.
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- People choosing taps or screw pilot holes
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- The reference values are for cut taps; the page says to follow a tap maker’s different recommendation.
Field notes
The reference material separates inch, metric, and NPT threads, and includes both hardwood screw pilots and lag-screw pilots. The page limits its tap-drill figures to standard values for cut taps and advises readers to use a tap maker’s different recommendation. It also discloses that tool recommendations may earn affiliate commissions.
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Editorial observations of this landing page, not a rating.
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