| Manufacturer Part Number | L121K400 |
| Thread Size (Inch) | 1/4 " & 3/8" |
| Threads per Inch (TPI) | 18 |
| Thread Series | NPS |
| Thread Size (Decimal Inch) | 0.363" |
| Thread Size (mm) | 9.22mm |
| Shank Diameter (Inch) | 3/8" |
| Shank Diameter (Decimal Inch) | 0.375" |
| Shank Diameter (mm) | 9.53mm |
| Thread Length (Decimal Inch) | 0.833" |
| Thread Length (mm) | 21.16mm |
| Overall Length (Inch) | 3-1/2" |
| Overall Length (Decimal Inch) | 3.500" |
| Overall Length (mm) | 88.90mm |
| Shank Type | Plain |
| Helix Angle (Degree) | 15 Degree |
| Number of Flutes | 4 |
| Coating | TiAIN |
| Material | Carbide |
| Application | P,K,N |
| Series | L121K |
| Cutting Direction | Right Hand |
| Product Type | Helical Flute Thread Mill |