Mitutoyo; Thread Micrometer This Screw Thread Micrometer has a fixed anvil, offering the following benefits: Fixed anvil type. It directly indicates screw pitch diameter, meaning no need for calculation. All images are for representation only. This Screw Thread Micrometer should be used with optional, interchangeable, anvils/spindle-tips that allow you to measure a wide range of metric/unified and Whitworth screw-thread pitch diameters.A metric (unified) 60º setting standard is included with all models except those measuring range from 0-25 mm. Specification Digital/Analog: Analog Delivered: Including box, spanner, setting standard 60° (inch) Inch-Metric: Inch Range: 4 - 5 " Graduation: 0,001" Spindle feed error: 0.00015 inch Measuring face: Interchangeable anvil/spindle inserts (optional) Measuring spindle: With spindle lock, ø6,35 mm, spindle pitch 0,5 mm Scale: Thimble and sleeve satin chrome finish, ø18 mm Measuring force: 5 - 10 N Mass: 530 g