UN 5/16"x18-2xDo - 18TPI Pitch UN Helical Flute Internal Carbide Thread Mill with Radial Coolant - (Helicool R HCR Series - Vardex)
106-00039
Thread Milling TM Solid Carbide HeliCool-Radial Cooling IN 18TPI ISO Shank Diameter 8 (mm) Cutting Diameter 6.15 (mm) Tool Overhang 16.2 (mm) VTH Grade
- For Internal Machining
- For UN threads
- Ideal for Steel, Stainless Steel, HRSA's, Cast Iron & Non-Ferrous
- Made from Micro grain Solid Carbide
- TiCN coating for longer tool life
- Radial Coolant For Through Holes

| Thread Standard | UN |
| Pitch | 18TPI |
| EXT/INT | IN |
| Coolant | Yes |
| L | 16.2mm |
| L1 | 16.2mm |
| Le | 16.2mm |
| Cutting Dia | 6.15mm |
| Z | 3 |
| Zt | 11 |
| Grade | VTH |
| Coating | TiCN |
| Description | HCR08061L16-I18UNCTMVTH |
| Shank Dia | 8mm |
106-00039 UN 5/16"X18-2XDO - 18TPI PITCH UN HELICAL FLUTE INTERNAL CARBIDE THREAD MILL WITH RADIAL COOLANT - (HELICOOL R HCR SERIES - VARDEX)