This is the M4 disc stylus #A-5000-7597.
Disc styli are designed to inspect undercuts and grooves within bores which may be in accessible to star styli. A range of disc styli offers a ‘radius end roller’ to enable groove width measurement.
| Diameter (A) | 35 mm |
| Diameter (G) | 21.0 mm |
| Width (B) | 2.2 mm |
| C | 3.0 mm |
| F | 10.0 mm |
| E | 10.0 mm |
| Mass | 9.57 g |
| Disk material | Silver Steel |
