This standard describes the types of gauges and gauging procedures used for the assessment of the conformance to dimensional specification of plain workpieces. The standard covers a size range up to and including 500 mm for gauges for holes, and up to and including 315 mm for gauges for shafts. The limitation of the size range for gauges for shafts is due to the fact that there is no international agreement on these types of gauges for sizes over 315 mm. The standard is presented as appropriate to plain cylindrical surfaces, but the principles may be used for other geometric forms. The standard defines the types of gauges and their applications, specifies tolerances and wear limits for gauging surfaces, establishes minimum requirements for gauge materials and recommends gauging methods and procedures for resolving possible disputes. Interpretation of the limits of size, including geometric deviations and provisions for gauge identification are also included.The design and material requirements are limited to those affecting gauging surfaces and performance of gauges.The main section of the standard is limited to sizes up to 180 mm, with sizes over 180 mm given in Appendix D. Other appendices contain information on interpretation of workpiece limits of size and the Taylor principle; verification of gauges; derivation of gauge deviations; examples in the use of the tables; temperature effects.