| Manufacturer Part Number | GYG66020 |
| Mill Diameter (Decimal Inch) | 0.3125" |
| Mill Diameter (Inch) | 5/16" |
| Mill Diameter (mm) | 7.94mm |
| Shank Diameter (Decimal Inch) | 0.3750" |
| Shank Diameter (Inch) | 3/8" |
| Shank Diameter (mm) | 9.53mm |
| Length of Cut (Decimal Inch) | 0.7500" |
| Length of Cut (Inch) | 3/4" |
| Length of Cut (mm) | 19.05mm |
| Overall Length (Decimal Inch) | 2.5000" |
| Overall Length (Inch) | 2-1/2" |
| Overall Length (mm) | 63.50mm |
| Series | GYG66 |
| Number of Flutes | 4 |
| Helix Angle | Variable |
| Coating | ALCrN |
| Material | PM60 |
| Shank Style | Flat |
| Cut Type | Center Cut |
| Corner Type | Square End |
| Application | P, M, K |
| Cutting Direction | Right Hand |
| Product Type | Square End Mill |