| A | B |
|---|
| Direct Measurement | when you measure an unknown length |
| Class AA Gauge Block | used in laboratories for experimental work and research |
| Class A Gauge Block | used mainly for quality control inspection of finished part dimensions |
| Class B Gauge Block | used throughout th eplant wherever accurate measurement is required |
| Wear Blocks | used when necessary to protect the softer "common" blocks |
| Go, No-Go Gauge | used mainly for inspection of machine-finished parts on production lines. |
| Radius Gauge | device used for measuring an internal or external radius |
| Surface | boundry between an object and its surroundings. |
| Roughness | finely spaced irregularities on a surface. |
| Waviness | broad surface irregularities. |
| Lay | the direction of the most obvious pattern of roughness irregularities, generally the direction of marks left by a tool. |
| Surface Flaws | include holes, cracks, bumps, and ridges. |
| Ultraviolet Light | also known as black light. |
