The L.S. Starrett Co. No. 436 Outside Micrometer is a precision instrument for measuring external diameters, featuring a ratchet thimble and a 13–14 inch range. It provides 0.001 inch resolution for fine diameter readings. Designed for machinists and metalworking applications, it is used to verify outer dimensions on cylindrical components such as shafts, sleeves, and housings.
