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We offer a complete product range of Casing, SquareMaster, CDRP and Thread Profile Gages


  • SIZE T.P.I.
  • 4-1/2* 8
  • 5* 8

PMC Lone Star manufactures API 8 Round Casing working (STC & LTC) and reference master gages per API Specification 5B for sizes from 4-12 to 20 inches in diameter. All working gages are manufactured and certified using a certified API reference master gage as required by the stan

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The SquareMaster can measure with an accuracy of ± 0.000050 of an inch (50 millionths) over any 12” or 18″ of specified range. No hand gage even comes close. The SquareMaster can be used for virtually any measurement of straightness, squareness or parallelism on interior or exterior surfaces. Its precision direct dial readout substitutes reliable and repeatable results for the subjective calculations you probably now make.

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Tired of having to always re-tighten those loose gage settings? PMC Lone Star’s CDRP has the solution! The design of PMC Lone Star’s Crest Diameter Gaging System improves upon the shortcomings of other variable gages, increasing measurement accuracy and effiency by increasing the reliability of the gage assembly and it’s mechanisms. This improved design means less time adjusting and more time spent inspecting product! Inspect crest diameter & ovality of pipe and couplings for API, semi-premium and premium threaded connections. Use of the CDRP enhances the overall reliability of your connection when used in conjunction with ring and plug gages. CDRP design provides superior performance and reliability over other variable gaging systems.

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Thread Profile Gages

  • PG-453 -API REG: 2-3/8” thru 4-1/2” -API FULL HOLE: 3-1/2”, 4-1/2”
  • PG-542 API REGULAR: 6-5/8” -API FULL HOLE:5-1/2”, 6-5/8”

Quickly Identify Tapered Thread Forms! PMC Lone Star Thread Profile Gages are manufactured to industry standard tolerances using our state-of-the-art Wire EDM technology. Our Thread Profile Gages quickly identify tapered thread forms per the API Standards 5B and Spec 7 as well as Stub Acme, National Acme and others. All our Thread Profile Gages are in stock for immediate delivery and we offer specials made to your specifications.

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  • White House, TN 37188, United States