Heli-Coil - 1/2-20 UNF, H3, 4 Flute, Bottoming Chamfer, Bright Finish, High Speed Steel Hand STI Tap - 3-19/32" OAL, 1-21/32" Thread Length, 1/2" Square Length, 0.322" Square Size, 3B Class of Fit
Item #: 64831555
Brand: Heli-Coil
Model #: 8FBB
Exact Tooling IR#: 04
Features and Benefits
Bottoming chamfers are used for threading blind holes to the bottom. They have 1 to 2 threads.
Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.
High Speed Steel (HSS) provides good wear-resistance and can be used in general purpose applications for both ferrous and non-ferrous materials.
| Product Specifications | |
|---|---|
| Thread Size (Inch) | 1/2-20 |
| Class of Fit | 3B |
| Thread Limit | H3 |
| Number of Flutes | 4 |
| Chamfer | Bottoming |
| Finish/Coating | Bright |
| Overall Length (Inch) | 3-19/32 |
| Thread Standard | UNF |
| Thread Length (Inch) | 1-21/32 |
| Shank Diameter (Decimal Inch) | 0.4290 |
| Square Length (Inch) | 1/2 |
| Square Size (Decimal Inch) | 0.3220 |
| Material | High Speed Steel |
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