Mitutoyo 543-396 Absolute Digimatic Indicator, ID-C Standard Type, #4-48 UNF Thread, 3/8" Stem Dia., Lug Back, 0-0.5" (0-12.7mm) Range, 0.00005" (0.001mm) Resolution, +/-0.0001" Accuracy, Meets IP42 Specifications Electronic indicator measures 0 to 0.5" (0 to 12.7mm) with 0.00005" (0.001mm) resolution and + or - 0.0001" 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 lug back for mounting from the rear of the indicator Low measuring force (0.4 to 0.7 Newtons (N)) for working with softer or more delicate workpieces Ingress Protection certified IP42 for protection against objects greater than 1mm and dripping water