Before screw thread insert installation, the drilled hole has to be tapped with a STI hand tap or machine tap of the correct tap size.

Types of STI Taps available include:
1. Standard Plug screw thread insert taps (4-Thread Chamfer): Easy starting for through-holes and blind holes.

2. Standard Bottoming screw thread insert taps (2-Thread Chamfer): Ideal for blind holes that are drilled to a minimum depth.

3. Spiral Pointed Plug screw thread insert taps (4-Thread Chamfer): Free-cutting for use in long through-holes and in blind holes with chip clearance.

4. Spiral Flute Bottoming screw thread insert taps (2-Thread Chamfer): Pulls chips out of deep or blind holes in soft materials.