17.09mm Dia, 2" Long Vermont Gage Class ZZ Minus Pin Gage, manufacturer part number 112417090.
Specifications: Diameter of Measurement: 17.09 mm; Gage Function: No-Go (Minus); Class: ZZ; Tolerance: 0.005 mm; Surface Finish: 10 Micro Finish; Overall Length: 2.0000 in.
Material: Tool Steel. Unit of measure: Metric.