Mitutoyo 543-793 Absolute Digimatic Indicator, ID-S-Type, Lug Back, #4-48 UNF Thread, 3/8" Stem Dia., 0-0.5" Range, 0.0001" Resolution, +/-0.00012" Accuracy, Meets IP42 Specifications Electronic indicator measures 0 to 0.5" (0 to 12.7mm) with 0.0001" (0.001mm) resolution and + or - 0.00012" accuracy, for measuring short, linear distances in mechanical engineering, machining, and manufacturing applications LCD displays in both inches and metric units, and indicator has a lug back for mounting from the rear of the indicator Absolute electrostatic capacitance-type linear encoder for accurate measurements 3/8" diameter stem and a #4-48 UNF contact point thread mount Ingress Protection certified IP42 for protection against objects greater than 1mm and dripping water