Spence Industries, Inc.
A pitch diameter is a constant number. Precision JO-PLUG® tapped hole location gages offer a calibrated pitch cylinder parallel to our industry leading .625 long projected tolerance zone. Whether using circle paths or straight lines, more data points are collected.
A wooden box containing a set of metal gauges.
Precision JO-PLUGS® are the best threaded hole location gage on the market for determining basic position and orientation of tapped holes. Available individually or in Sets in the JO-PLUG® Store.
Spence Industries, Inc.
Spence Industries, Inc. specializes in the manufacture of true position gages for unique applications. Extended projected tolerance zones, tapped holes below counterbores, tapered pitch diameters for irregular surfaces and other custom thread forms are examples of gages available for manufacture.

ASME Y14.5-2018, “Dimensioning and Tolerancing,” Section 2.9 states that “each tolerance of orientation and datum reference for a screw thread applies to the axis of the thread derived from the pitch cylinder.”

Spence Industries, Inc. offers the best gage on the market for determining basic position and orientation of threaded holes. With a calibrated pitch cylinder and longest standard projected tolerance zone, JO-PLUGS® provide positive quality results  with repeatability and reproducibility.

 

  • C of C traceable to NIST and ISO/IEC 17025:2018 and ANSI/NCSL Z540-1-1994 Accreditation at no charge
  • Unified Series pitch diameters are “Go Basic,” suitable for Classes 2B and 3B
  • Fast delivery: Unified, Metric and Heli-Coil® series true position locators
  • Quick turn-around on custom manufacture JO-PLUGS®

We specialize in: Tapped hole location gages, threaded hole location gages, true position gages, Tapped hole location gage, hole location gage, true position threaded gages, threaded location gages, true position threaded location gages, flex plugs, centerline location gages, tapped hole, cylindrical axis, true position, true position of a threaded hole, threaded hole location pins, threaded position gages, CMM threaded location gages, CMM Accessory gage, true position pins, true position hole locators, true position locator, tapped hole location pins, JO-PLUG®, Jo-plug, spence industries, thread gages, threaded gages, thread plug gage, thread ring gage, thread ring setting plug, Unified tapped hole location gage, Metric tapped hole location gage and Heli-coil tapped hole location gage and any of your custom gage needs.

 

Our repeat and satisfied customers are the leaders and best in meeting American and international quality standards. Customers in the aerospace, automotive, defense, electronic, and medical device industries benefit from our fast and accurate method of determining positional tolerance of threaded holes with repeatability and reproducibility.

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Spence Industries, Inc. is proud to be enrolled assisting United States government facilities make exceptional products.

Please use this form to request information or call our HOTLINE (586) 758-3800 for immediate assistance. We will be glad to answer questions on in-stock items or offer our expertise with unique inspection requirements.

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Spence Industries, Inc.