🔍 Key Concepts

• Taps vs. dies – which is for internal threads and which is for external threads • Different tap types: taper, plug, and bottoming taps and how they are used in blind vs. through holes • What it means to chase or clean up threads compared to cutting new ones

💭 Think About

• Which tool would you normally use to create or repair threads inside a hole, and which would you use on a cylindrical rod/shaft? • In a blind hole (where the hole does not go all the way through), at what stage of the threading operation would you use a tap that has almost full threads right to the end? • Look at the options involving a circular rod: are those operations usually done with taps or with dies?

✅ Before You Answer

• Identify which options describe work on internal threads (inside a hole) versus external threads (on a rod). • Recall the order of use: taper tap, then plug tap, then which one is used to finish threads to the bottom of a blind hole. • Verify which operation is correctly associated with a bottoming tap, not with a die.