Screw Thread Systems

Question 1

What are the 3 transmission threads?

Answer 1

• Square
• Buttress
• ACME

Question 2

What 3 type of plugs do we use to tap a thread into a hole?

Answer 2

• Taper Tap
• Intermediate Tap
• Plug Tap

Question 3

Why is it important to ensure you use all 3 taps on a blind hole?

Answer 3

As you reach the bottom of a blind hole with either of the taper or intermediate taps, the thread isn’t being inserted at the bottom of the whole, this is why there is no taper on a plug tap.

Question 4

What is the 2 correct names for a ‘Die’?

Answer 4

A Split/Button Die

Question 5

What is the purpose of a button die?

Answer 5

To put an external thread onto a bolt