Industrial GP1-M-7.2120-X-MEAN Air Gage Bore Setting Ring

Industrial GP1-M-7.2120-X-MEAN Air Gage Bore Setting Ring is a precision master ring used to calibrate and set air gage bore measurement systems. The designation includes A-89777 and GP-M-7.212, and the full model name is GP1-M-7.2120-X-MEAN, linking it to a family of GP components used for bore and air gage calibration. As a master ring, it provides a reference diameter that setting air gages and bore gages are zeroed against, supporting repeatable measurements across parts and shifts. In typical calibration workflows, technicians use this type of setting ring with air jet assemblies and ring gage tooling to establish a known bore reference prior to part measurement. This ring is designed for industrial metrology environments where precise and repeatable bore setting is essential for accurate manufacturing and inspection results.