# K20 — Carbide insert grade cross-reference by ISO application group and manufacturer

For K20, manufacturer is Romay; grade designation(s) is R-300 R-400, recorded from its source on 2026-08-11.

- **ISO application code:** K20 _(verified: appears in the quote below)_
- **Manufacturer:** Romay _(our reading, not quoted from the source)_
- **Grade designation(s):** R-300 R-400 _(verified: appears in the quote below)_

## What the source says

> K20 | R-300 R-400 |

## Source

- https://romaycorp.com/charts/carbide-comparison-chart/

Last verified: 2026-08-11. Review by: 2028-08-10.
Part of [Carbide insert grade cross-reference by ISO application group and manufacturer](https://referencesource.org/industrial-consumable-tooling-cross-reference/).