The Black Guard™ Class ZZ No-Go pin gauge is a precision tool designed for accurate hole size measurement. Constructed from durable tool steel, this pin features a specialized surface treatment that penetrates 0.000040 in. to 0.000060 in. deep, providing a visible indicator of wear patterns to facilitate effective calibration and replacement. It is engineered to deliver reliable performance in various metalworking and inspection environments.
- Provides a tolerance of 0.0002 in.
- Includes a certificate of accuracy with NIST traceability
- Surface finish of 10 microinch or better
- Hardness rating of 60 to 65 Rc
- Visible wear indication helps prevent rust and corrosion
- Cylindrical shape with 2 in. length
- Marked with size and direction of tolerance for diameters over 0.0605 in.