The 121-18424 is a 1 5/16"-24 high speed steel plug tap, designated GH4 4F. Plug taps feature a 3 to 5 thread chamfer and are commonly used to start internal threads.
This hand tap is intended for general-purpose hand tapping operations, including threading through holes and some blind holes in ferrous and nonferrous materials.
- Product model: 121-18424
- Size: 1 5/16"-24
- Type: High speed steel plug tap
- Designation: GH4 4F
- Thread chamfer: 3 to 5 threads
- Use: General-purpose hand tapping operations
- Material capability: Ferrous and nonferrous materials
