Starrett No. 436 Outside Micrometer Ratchet Thimble

Starrett No. 436 Outside Micrometer with ratchet thimble measures external dimensions in the 12" to 13" range, with a reading resolution of 0.0003". The ratchet thimble maintains constant pressure for repeatable results, a hallmark of Starrett precision. As an outside micrometer, it gauges exterior diameters of cylindrical parts within its capacity, a common need in metalworking, machining, and quality control. This instrument supports reliable dimension verification for components such as long shafts or sleeves where tight tolerances must be confirmed. Its standard sleeve and thimble graduations are designed for easy reading, reducing parallax errors and providing clear, consistent data at a glance. In production or inspection settings, this micrometer helps verify part dimensions during setup, gauging, and routine QC checks, contributing to fast, confident decision-making about fit and interchangeability.