FANAR left-hand tap M20 N1-111001-0200 — left-hand threading, metric M20

FANAR left-hand tap M20 (model N1-111001-0200) is a precision hand or machine tap engineered for cutting and restoring internal left-hand metric M20 threads. It is intended for applications that require reverse (counterclockwise) threading and provides accurate thread profiles for components in metalworking, maintenance, and assembly tasks where left-hand thread orientation is specified.

Advantages

This left-hand tap offers consistent thread cutting performance and dimensional accuracy for M20 internal threads. Its geometry is suitable for both manual tapping and use in tapping machines or fixtures, enabling efficient thread forming or repair. Designed for metalworking tasks, the tool provides repeatable results when creating or restoring left-handed threads in a variety of ferrous and non-ferrous materials. The tap's design supports stable chip evacuation and reduces the risk of thread damage when used with appropriate speeds, feeds, and lubrication.

Suitable for

• Creating new internal left-hand metric M20 threads in metal components
• Restoring damaged or worn M20 left-hand threads during maintenance
• Assembly operations that require counterclockwise fastening or safety threads
• Use in both hand tapping and machine tapping setups

Key specifications

• Thread type: left-hand metric
• Nominal size: M20 (internal thread)
• Application: cutting and restoring internal threads
• Suitable for manual and machine tapping
• Material compatibility: general-purpose use in common ferrous and non-ferrous metals

How to use

Secure the workpiece firmly and ensure the tap axis is aligned with the hole. If cutting a new thread, drill the correct size pilot hole for M20 internal threads following standard tapping drill charts. Apply suitable cutting fluid and begin tapping with steady, controlled rotation in the counterclockwise direction for left-hand threads. For manual tapping, use a T-handle or tap wrench; for machine tapping, set appropriate spindle speed and feed to match the material and tap type. Periodically reverse slightly or back off to break and clear chips, and maintain consistent lubrication to extend tool life and ensure accurate threads.

Usage recommendations

Use appropriate cutting oil and select the correct pilot drill size for M20 threads. For hardened or abrasive materials, consider pre-drilling and using multiple-pass tapping or spiral-fluted taps designed for improved chip evacuation. Inspect tapped threads with gauges or mating fasteners to confirm fit and correct engagement.