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Email thread gauge requests to

API plain gauges and API thread gauges refer to precision instruments used for measuring the dimensions and characteristics of mechanical parts, particularly in threaded connections. These gauges ensure that parts meet specific tolerances and standards, contributing to the quality and compatibility of components used in oil & gas machinery and industrial processes.

American Petroleum Institute’s (API) 5B Specification for Threading, Gauging, and Inspection of Casing, Tubing, and Line Pipe

This specification governs API 5B 60° V threads,also known as  8 Round & 10 Round or Tubing & Casing.

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