Starrett 234A-13 End Measuring Standard Rod

Starrett 234A-13 End Measuring Rod with Rubber Handle, 13 inches long, is a precision micrometer setting standard designed for checking and setting micrometers with 2 inches capacity and larger, and for comparing gages on machine tools. It is made from special tool steel, with ends hardened and accurately lapped to a spherical radius, and a 7/16-inch diameter rod that provides a robust, repeatable reference length. The 234A series rods are used to measure parallel surfaces, verify precision tools, and serve as reference lengths in setups where a fixed length is required, such as aligning workpieces or benchmarking instrument dimensions in workshop environments. This model’s rubber grip aids handling during routine calibration checks and gage comparisons.