The 121-85612 is a 3 1/2-12 high speed steel bottom hand tap for producing internal threads in prepared holes. Its bottom-tap configuration is intended for threading operations where threads need to extend toward the bottom of a blind hole.
Typical applications include manual or general-purpose internal-threading work using a hand tap in suitable prepared holes, including blind-hole threading operations.
- Model: 121-85612
- Size and thread designation: 3 1/2-12
- Material: High speed steel
- Tool type: Bottom hand tap
