The standard IEC60061 includes 3 parts, each parts covering a single group.
Part 1 (IEC60061-1) contains the introduction to the publication as a whole, and the standard sheets for lamp caps.
Part 2 (IEC60061-2) contains the standard sheets for lampholders
Part 3 (IEC60061-3) contains the standard sheets for gauges
The gauges specified in IEC60061-3 are applied to check the sizes of lampcaps and lamholders of IEC60061-1 and IEC60061-2. The gauges are made of high-hardness alloy which has good performance in wear resistance. The structure and sharp (like thread waveform) of gauges are calculated and optimized by computer, and then process by computer machine to reach high precision and nice-looking, all the gauges can pass the calibration from an third-party lab authorized by ISO17025.
