Manufacturer Part Number: 21-251-4|Contact Point Style|FlatPoint Material|Black Oxide SteelContact Point Length (Decimal Inch)|0.2500Contact Point Length (Inch)|1/4Contact Point Length (mm)|Diameter (mm)|Ball Diameter (mm)|Ball Diameter (Inch)|Ball Diameter (Decimal Inch)|Overall Length (Decimal Inch)|Overall Length (mm)|Overall Length (Inch)|Thread Size|#4-48Point Angle|Industry Designation|AGD Group 1For Use With|Dial IndicatorsApplication|Features|Absolute Encoder Ensures All Settings; Function Lock; Switchable Resolutions on Models Noted BelowDiameter (Inch, Fraction)|3/16Point Identification|Diameter of Measurement (Decimal Inch)|Manufacturer's Part Number|Product Service Code|UNSPSC Code|41111600