Starrett No. 436 Mechanical Outside Micrometer with a ratchet thimble is designed to measure external dimensions in the 13" to 14" range with a 0.001" least count, providing precise readings for larger components. This mechanical micrometer is used in metalworking and inspection to determine the outside size of workpieces, fixtures, or tools within its capacity. The ratchet thimble helps apply consistent measuring force to improve repeatability across measurements, making it suitable for shop and lab environments that require reliable, non-digital metrology equipment.
