Mitutoyo"2416S" Dial Indicator, 4-48 UNF Thread, 0.375" Stem Dia,"lug Back," White Dial, 0-100 Reading, 2.244" Dial Dia, 0-1" Range, 0.001" Graduation, -0.002" Accuracy Standard dial indicator with a 0.375" diameter stem, a #4-48 UNF contact point thread mount, and choice of white or black face, for measuring surface variations in fractional inches Units displayed in fractional inches, and has a rotating bezel and limit markers Choice of flat or lug back for a variety of mounting options Stem design provides long clamping range, no through screw-hole on the frame for dust- and water resistance, and involute curved lifting lever provides smooth movement of spindle and dovetail joint for tool-less connection Meets ANSI standards, Japanese Industrial Standard (JIS) B7503-1997, and American Gage Design (AGD) standards for face and thread size, and bezel and stem diameter