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.”
Precision JO-PLUGS® threaded hole location gages establish the true functional axis of the internal thread, which is exactly what ASME Y14.5-2018 intends when controlling position and orientation of threaded features. Precision JO-PLUGS® align with the internal threads pitch diameter, allowing accurate assessment of orientation controls applied to threaded holes, such as perpendicularity or angularity to datum features. Each Precision JO-PLUG® tapped hole location gage is calibrated and ISO/IEC 17025:2017 Accredited, giving users documented confidence, traceability, and proven metrology integrity in every inspection. A Certificate of Compliance is included at no additional cost with every order.
Precision JO-PLUGS® also feature a standard .625" projected shank length, creating the longest practical tolerance zone on the market for establishing a highly stable axis and enabling increased data point collection. Whether your vision system or CMM collects data using straight-line scanning paths or circular probing strategies, the extended projection improves certainty, strengthens orientation evaluation, and enhances true positional measurement. Precision JO-PLUGS® deliver the verification confidence professional manufacturers require in aerospace, automotive, defense and medical equipment industries.
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.
Available in standard Heli-Coil, Metric or Unified Series Sets or "Customer Designed Sets" based on your company requirements. JO-PLUGS® provide positive quality results with repeatability and reproducibility. America's most discerning Quality Labs prefer ISO 17025:2017 Accredited threads forms.
Spence Industries, Inc. specializes in the manufacture of Custom JO-PLUG® tapped hole location gages designed to your exact thread size, class, and application requirements. Built to comply with ASME Y14.5-2018 principles, they provide a stable, repeatable datum for accurate position and orientation inspection on CMMs.
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Spence Industries, Inc. is proud to be enrolled assisting United States government facilities make exceptional products.
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