The A Brand AT-1 threadmill is designed with a left-hand helix for a small pitch diameter difference between the hole entry and the bottom of the hole, allowing a delay in gauge-out failure. Longer tool life can be achieved with elimination of zero cutting for correcting bending.
Features & Benefits:
- Unequal Spacing / Variable Lead Flute: For reduced vibration
- Right-Hand Cut & Left-Hand Helix Geometry: Increases tool stability
- EgiAs Coating: For exceptional wear resistance
- Ultra-Fine Grain Carbide: For high wear resistance and toughness
Product Specifications
Manufacturer Part Number | 1663000317 |
Cutting Direction | Right Hand |
Diameter (Decimal Inch) | 0.461" |
Helix Angle (Degree) | 11 Degree |
Helix Direction | Right Hand |
Length of Cut (Decimal Inch) | 0.611" |
List Name | AT-1 NPT |
Major Diameter (Decimal Inch) | 0.461" |
Neck Length (Decimal Inch) | 0.720" |
Number of Flutes | 5 |
Overall Length (Decimal Inch) | 3.500" |
Shank Diameter (Decimal Inch) | 0.500" |
Shank Tolerance | h6 |
Material | Carbide |
Coating | EgiAs |
Thread Size (Inch) | 3/8" |
Thread Type | NPT |
Thread Per Inch (TPI) | 18 TPI |
Product Type | Helical Flute Thread Mill |

Warning:
This product can expose you to materials and/or chemicals including arsenic, lead, and other materials and/or chemicals which are known to the state of California to cause cancer and/or reproductive harm.
For more information, visit www.P65Warnings.ca.gov
Brand:
OSG
Cutting Direction:
Right Hand
Diameter (Decimal Inch):
0.4610"
Helix Angle:
11 Degree
Length of Cut (Decimal Inch):
0.6110"
Neck Length (Decimal Inch):
0.7200"
Number of Flutes:
5
Overall Length (Decimal Inch):
3.5000"
Shank Diameter (Decimal Inch):
0.5000"
Material:
Carbide
Finish/Coating:
EgiAs
Thread Size (Inch):
3/8"
Thread Type:
NPT
Thread Per Inch:
18 TPI
interval quantity:
1