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

For K20, manufacturer is Toshiba; grade designation(s) is T1015 T5020 AH120 J740, recorded from its source on 2026-08-11.

- **ISO application code:** K20 _(verified: appears in the quote below)_
- **Manufacturer:** Toshiba _(our reading, not quoted from the source)_
- **Grade designation(s):** T1015 T5020 AH120 J740 _(verified: appears in the quote below)_

## What the source says

> K20 | R-300 R-400 | UP10H UC6010 AP15TF | GC1020 GC1120 GC3025 GC3020 GC4025 | TX150 T15M T25M T250M TP200 | AC500G EH20Z | T1015 T5020 AH120 J740 |

## 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/carbide-insert-grade-cross-reference/).