Mitutoyo 543-402B Absolute Digimatic Indicator, ID-C Standard Type, #4-48 UNF Thread, 3/8" Stem Dia., Flat Back, 0-0.5" (0-12.7mm) Range, 0.0005" (0.01mm) Resolution, +/-0.001" Accuracy, Meets IP42 Specifications Electronic indicator measures 0 to 0.5" (0 to 12.7mm) with 0.0005" (0.01mm) resolution and + or - 0.001" accuracy, for measuring short, linear distances in mechanical engineering, machining, and manufacturing applications LCD screen displays measurements in inches and metric units, go/no-go display lights red or green when upper and lower tolerances have been set, and indicator face can be rotated 330 degrees for reading from different angles Stem has 3/8" diameter and a #4-48 UNF contact point thread mount, and unit has a flat back for stem/plate mounting Absolute electrostatic capacitance-type linear encoder for accurate measurements Ingress Protection certified IP42 for protection against objects greater than 1mm and dripping water