| EDP Number | 191RBQT |
| Product Code-ANSI | TCMA32.51-AC420K |
| Product Code-ISO | TCMW16T304 |
| Manufacturer Grade Identification | AC420K |
| Series | AC420K |
| Cutting Edge Length (Decimal Inch) | 0.6496" |
| Cutting Edge Length (mm) | 16.50mm |
| Nose Radius (Decimal Inch) | 0.0157" |
| Nose Radius (mm) | 0.40mm |
| Inscribed Circle Diameter (Decimal Inch) | 0.3750" |
| Inscribed Circle Diameter (mm) | 9.53mm |
| Hole Diameter (mm) | 3.81mm |
| Insert Thickness (Decimal Inch) | 0.1563" |
| Insert Thickness (mm) | 3.97mm |
| Relief Angle | 7 Degree |
| Rake Angle | Positive |
| Insert Material | Carbide |
| Tolerance Class | M |
| Corner Angle | 60 |
| Insert Style | TCMA |
| Primary Workpiece Material | Cast Iron |
| Coating | Super FF coat |
| Coating Process | CVD |
| Standard Designation of the Grade, Main Application | K20, K15, K15 |
| Insert Holding Method | Screw-On |