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3 Wire Thread Measuring System

The Thread Check 3-Wire Thread Measuring System provides fast and accurate thread measurement on a variety of measuring instruments.



  • Certify set plug gages and working thread plug gages
  • Monitor the wear on working thread plug gages
  • Monitor and control pitch diameter variation during thread fabrication
  • Use in conjunction with Go and No Go ring gages to control thread sizes to the most demanding specification
  • Determine out of roundness and taper that may exist in threaded parts
  • Eliminate the cost and time involved in using outside calibration services
  • Reduce measurement time to a fraction of time normally taking using the traditional three-wire method

The traditional three-wire method is the most accurate method of measuring the effective or pitch diameter of an external screw thread. Unfortunately in the past, holding and correctly positioning three wires against a thread while simultaneously taking an accurate measurement has been a very difficult task. Now The thread Check Measuring System provides as simple and precise way for determining the pitch diameter for threaded parts and thread plug gages The system enhances Repeatability and Reproducibility (R& R) and reduces measurement time to a fraction of the time normally taken using the traditional three-wire method.

The Thread Check Measuring System offers specially designed wire holders and wires, base assemblies, and vertically adjustable offset platforms that make thread measurement fast and accurate. Thread Check's holders are fitted with certified full length thread measuring wires that meet or exceed the requirements of ASME/ANSI B 1.2 B1 16M thread standards as well as Federal Spec. GGG-W-366B and ISO standards. All wire holder sets include the actual wire size, NIST traceable number, and the constant required for determining the pitch diameter.

Thread measuring holders are precision made to predetermined thread pitches. Thread measuring wires are held in predetermined position by light pressure clips. The holders rotate freely on the spindle/anvil of the measuring instrument so as to engage the lead angle of thread. Holders for fine pitches have wires positioned of center to allow for measurement at the back of the thread and closer to the shoulder of certain part. Holders can be purchased without wires for companies that have existing wires. Wires can be easily installed, Thread measuring holders are available in a full range of Standard, Metric, And Acme sizes. Our engineering department can design wire holders for multiple start threads, helical gears, worms and other special thread measurement applications.


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Gage Crib Worldwide, Inc.
6701 Old 28th St SE, Suite B
Grand Rapids, MI 49546-6937
Phone: 001-616-954-6581 • Fax: 001-616-954-6583

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