Welcome To Thread Gauge: Your Trusted Measuring Tools Online Shopping site

Thread Gauge Supply provides an easy way to buy thread gauges online. We carry a comprehensive collection of thread checkers and repair kits that include both inch and metric measurements. These tools are used to measure screw thread and calibrate gauges.

Finding the right thread for the right gauge can be one of the most frustrating parts of any repair or construction project. You may have boxes and boxes of bolts that may or not match a certain gauge. Let one of our many thread gauge checkers relieve your frustration. Stop playing the bolt matching game and order one of our tools today.

All thread gauges are made of the sturdiest materials. Our thread gauges, drill bit measurement, and bolt sizing tools can withstand the toughest work environments. Check out our Products page to see a full selection of our tools.

Thread Gauge Supply Products:

Bin Mount Bolt Gauge (For both inch, metric, and a set of both)

  • Includes 21 different measurements
  • Standard sizes
  • Coarse and fine threads
  • Includes an 8" standard ruler
  • The tool measures 25 3/8" W, 4" H. The base is 3" wide
  • Standard SAE sizes includes: 6-32, 8-32, 10-24, 10-32, 12-24, 1/4-20 COARSE, 1/4-28 FINE, 5/16-18 COARSE, 5/16-24 FINE, 3/8-16 COARSE, 3/8-24 FINE, 7/16-14 COARSE, 7/16-20 FINE, 1/2-13 COARSE, 1/2-20 FINE, 9/16-12 COARSE, 9/16-18 FINE, 5/8-11 COARSE, 5/8-18 FINE, 3/4-10 COARSE, 3/4-16 FINE.
  • METRIC SIZES INCLUDED: M4-.7 COARSE, M5-.8 COARSE, M6-1.0 COARSE, M7-1.0 COARSE, M8-1.25 COARSE, M8-1.0 FINE, M10-1.5 COARSE, M10-1.25 FINE, M10-1.0 EXTRA FINE, M12-1.75 COARSE, M12-1.5 FINE, M12-1.25 EXTRA FINE, M14-2.0 COARSE, M14-1.5 FINE AND M16-2.0 COARSE


Boltsizeit Nut and Bolt Measurement Gauge (Inch/metric)

  • Excellent for sizing bolts, screws, nuts (USS, SAE, and Metric) and twist drills
  • Size bolt diameter by pushing bolts through sizing holes
  • Gauges hex nuts and washers (USS, SAE)
  • Measure U.S. and metric thread pitches
  • Special notch gauges flat headed metal and wood screws
  • Resists water, alcohol, oil, and grease
  • Reliably accurate
  • Made of sturdy plastic
  • Easily fits in shirt pocket (8-5/8" x 3-1/4" or 217mm x 82mm)


Boltsizer Tri-Gage Combo Tool (Metricinch, or set of both)

  • Perfect for mechanics, machinists, engineers and do-it-yourselfers.
  • Clearly indicates the correct wrench size to use to install the bolt.
  • Rust-free
  • Machine stamped markings for durability
  • Inch/SAE sizes: 1/4in.-1in. bolt diameters
  • Metric sizes: 5-24mm bolt diameters
  • Made in the USA!


We carry other products, such as:

  • Combination gauges
  • Drill bit measurement gauges
  • Electrical terminal gauges
  • Internally threaded screw gauges
  • L gauge measurement tools
  • Large diameter bolt gauges
  • Metric screw checkers
  • Murray split die thread repair kits
  • Thread checker tools
  • Wall mount thread measurements
  • Wire rope and sheave measurement gauges

The most important ingredient to our success is our determination to ensure that our customers are 100% satisfied.

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