SPI 14-234-9 Screw Thread Micrometer Standard 60 Degree

SPI 14-234-9 is a 2-inch screw thread micrometer standard with a 60° thread form. This fixed reference geometry provides a known baseline for verifying micrometer readings on threaded parts and for routine calibration of micrometers against a 60° thread angle. The 14-234-9 designation identifies the model in SPI's catalog, and the 2-inch range aligns with common measurement tasks in mechanical metrology and quality control. Used in inspection, calibration, and shop-floor metrology, it supports repeatable checks of screw-thread measurements by offering a defined, reproducible reference against which instrument accuracy can be gauged. It is purpose-built for reference standards in assembling and maintaining thread measurement procedures where a precise 60° thread form matters. Having a dedicated standard for 60° threads helps minimize deviations caused by wear or misalignment in hand tools, so technicians can trust their thread measurements when parts require tight tolerances. By anchoring measurement checks to a specific model and range, shops can document calibration history and ensure consistent measurement practice across different operators.