Tap set Art-Pol M20 x 2.50 mm, 2-piece threading tap kit

Art-Pol two-piece tap set for M20 x 2.50 mm internal metric threads. The kit contains two taps matched to the M20 thread with a 2.50 mm pitch designed for cutting or restoring internal threads in metals and other machinable materials. The taps are suitable for both manual and machine tapping operations, providing a practical solution for maintenance, repair and fabrication tasks that require precise M20 metric threads.

Advantages

The two-piece configuration supplies a starter (roughing) and a finisher (plug) tap to improve chip control and thread accuracy compared with a single combined tap. Hardened working surfaces and straight flute geometry ensure consistent cutting performance and reduced risk of tap breakage in general-purpose materials. The kit’s standardized M20 x 2.50 mm sizing allows straightforward interchangeability with fasteners and components that conform to metric thread standards.

Suitable for

• Cutting or repairing M20 x 2.50 mm internal threads in steel and non-ferrous metals
• General maintenance and mechanical repair workshops
• Fabrication tasks where metric M20 threaded holes are required
• Manual hand tapping and machine tapping operations with appropriate holders

Key specifications

• Thread size: M20
• Thread pitch: 2.50 mm
• Number of pieces: 2 (roughing and finishing taps)
• Application: internal (female) metric threads
• Suitable materials: steels and common machinable metals

How to use

Select the correct tap holder or hand tap wrench for secure mounting. Begin with the roughing tap to establish the thread profile, applying cutting oil appropriate to the work material and advancing with steady rotation. Back the tap out periodically to clear chips and prevent clogging. After the roughing tap has completed most of the material removal, follow with the finishing tap to achieve the final thread size and surface finish. When using a machine, ensure correct alignment and controlled feed to avoid excessive torque on the tap.

Usage recommendations

Use appropriate cutting fluid, adequate chip evacuation and correct tap holders; avoid excessive axial force and always align the tap with the hole axis to reduce risk of tool breakage. For blind holes, withdraw the tap frequently to clear chips; for through holes, ensure chips can exit freely. Match tap choice to material hardness and consider using progressive tapping steps for harder alloys.