Basic StandardANSICoatingST/BronzeConnection diameter - fractional inch (DCON MS)1/2Connection diameter - inch (DCON MS)0.5Connection diameter - millimeter (DCON MS)12.7Cutting diameter - fractional inch (DC)1"Cutting diameter - inch (DC)1Cutting diameter - millimeter (DC)25.4EDP number252345Flute count (NOF)5Hand (Cutting direction)RightLength chip flute - fractional inch (LCF)4.1/2Length chip flute - inch (LCF)4.5MaterialHSSMaterial applicationN - Non-ferrous metals, P - Steel and cast steelMID number5986605Ordering code ANSIB1221Overall length - fractional inch (OAL)6.7/8Overall length - inch (OAL)6.875Overall length - millimeter (OAL)174.63ShankCylindrical shank
| Basic Standard | ANSI |
| Coating | ST/Bronze |
| Connection diameter - fractional inch (DCON MS) | 1/2 |
| Connection diameter - inch (DCON MS) | 0.5 |
| Connection diameter - millimeter (DCON MS) | 12.7 |
| Cutting diameter - fractional inch (DC) | 1" |
| Cutting diameter - inch (DC) | 1 |
| Cutting diameter - millimeter (DC) | 25.4 |
| EDP number | 252345 |
| Flute count (NOF) | 5 |
| Hand (Cutting direction) | Right |
| Length chip flute - fractional inch (LCF) | 4.1/2 |
| Length chip flute - inch (LCF) | 4.5 |
| Material | HSS |
| Material application | N - Non-ferrous metals, P - Steel and cast steel |
| MID number | 5986605 |
| Ordering code ANSI | B1221 |
| Overall length - fractional inch (OAL) | 6.7/8 |
| Overall length - inch (OAL) | 6.875 |
| Overall length - millimeter (OAL) | 174.63 |
| Shank | Cylindrical shank |