| Manufacturer: | KENNAMETAL |
| Grade name: | K420 |
| Insert material: | CARBIDE - UNCOATED |
| ISO range: (chart) | P30-40 M25-35 |
| ANSI range: | C6 |
| Coating: | |
| Description: | 'Composition: A medium binder content, alloyed, larger grain size grade. Application: Grade K420 is a general purpose steel cutting grade. It has just the right balance of wear resistance and toughness. Available as a standard grade in the Top Notch threading and grooving line. Can withstand heavy chip loads in soft to moderately hard steels. |