Gage Calibration and Thread Inspection Certification Thread Gage Certification and Calibration Services PMC Lonestar is accredited by A2LA to ISO/IEC 17025. "General Requirements for the Competence of Testing and Calibration Laboratories" We offer thread inspection and gage calibration certification for both new gages and customer property gages. Gages are certified accurate and traceable to the National Institute of Standards and Technology (NIST). We are licensed to API Specs 5B, 7 & 11B and can provide API thread inspection and gage calibration services. For over a half a century PMC Lone Star has been the trusted leader for gage calibration and thread inspection certification. To view our Scope of Gage Calibration and Thread Inspection Accreditation click here. You will need Acrobat Reader 4.0 to view this document. For a free download click here. Contact us for current gage calibration and thread inspection certification pricing and availability. Home | Contact Us | Unified Reversible Thread Plug Gages | Unified Taperlock Thread Plug Gages Unified Thread Ring Gages & Truncated Thread Setting Plug Gages | Unified HILO Thread Setting Plug Gages HILO™ Takes The Guesswork Out Of Setting Adjustable Ring Gages | Metric Thread Gages | Master Setting Discs 1, 2 & 3 Cylindrical Reversible Pin Type/Taperlock/Trilock Plugs | Cylindrical Plain Rings Steel & Carbide | Reversible Trilock Design Cylindrical Plug Gages & Midget Thread Trilocks - Reversible | Pipe Thread Gages | Gaging Practices | Basic Dimensions of Taper Pipe Threads API Thread Gages | SquareMaster™ | Metrology Equipment | Gage Calibration Services | International Gage Standards | Special Gages