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Gaging Spiralock® threads requires the use of special gages to ensure proper function of the thread. Non-Spiralock gages cannot determine the functionality of Spiralock® threads.
  1. Conventional Spiralock® threads:
    Conventional Spiralock® threads are defined as those of 32 threads per inch and coarser in English sizes and 0.80 mm lead and coarser in Metric sizes. These threads utilize a three (3) member gaging system. It consists of one (1) GO Pitch Diameter & Ramp Gage, one (1) NOT-GO Pitch Diameter Gage and one (1) NOT-GO Ramp Gage. In the catalog, these gages are defined as GO PLUG, HI-LIMIT P.D. and HI-LIMIT RAMP, respectively (See Section 13.3).
  2. Sawtooth Spiralock® Threads:
    Spiralock® sawtooth threads are defined as those finer than 32 threads per inch in English sizes and finer than 0.80 mm lead in Metric sizes. These threads utilize a two (2) member gaging system. It consists of one (1) GO Pitch Diameter & Ramp gage and one (1) NOT-GO Ramp gage. In the catalog these gages are defined as GO PLUG and HILIMIT respectively (See Section 13.4).
Download Full Definition of Acceptable Gaging Practices

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The availability of the products described on this site, and the product descriptions, may vary from country to country. Consult your STANLEY Engineered Fastening Account Executive or your local distributor for specific product information.