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Screw & Thread Gauge

pentarab Tools In-app purchases Contains ads

Measure screw size and thread pitch on screen at true size. Offline.

Downloads
7+
on Google Play
Price
Free
In-app purchases
Updated
Oct 29
2026 · v1.0.2
Get it onGoogle Play See alternatives

Screenshots

  • Screw & Thread Gauge screenshot 1
  • Screw & Thread Gauge screenshot 2

About Screw & Thread Gauge

Screw & Thread Gauge opens with a real-size screw already drawn. Hold your screw against the screen and match it — no calibration screen to get through first.

TRUE SIZE ON YOUR SCREEN
• Thread profile drawn to ISO geometry, not a clip-art screw
• Major, minor and pitch diameters shown as they really are
• Pitch rail for matching thread spacing
• Hex across-flats and socket head sizes to check what tool fits

METRIC AND INCH
• Metric M1.6 to M20 with coarse and fine pitches
• Inch UNC and UNF, #0 to #12 and 1/4" to 1/2"
• Tap drill and clearance hole sizes for each

MORE ACCURATE IF YOU WANT IT
Optional one-time calibration against any ISO ID-1 card (a bank card) makes the drawing exact on your device. Optional — the app works before you ever open it.

SOURCED, NOT GUESSED
Dimensions follow published standards, and the app names its sources. Sizes we could not verify were left out rather than filled in.

WORKS OFFLINE. Remove ads with a one-time purchase, or unlock the fine-pitch pack and saved calibration.

Pro: no ads, unlimited use, all features unlocked. One-time purchase.

What’s new

Version 1.0.2 · Updated October 29, 2026

Initial release.

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