Thread Tap FANAR M10x1.25 NGMM/2 DIN-2181/2 (6H) LH HSS

FANAR thread tap M10x1.25 NGMM/2 DIN-2181/2 (6H) LH HSS is a high-speed steel tap designed for cutting internal left-hand metric threads with a 1.25 mm pitch. Manufactured to DIN-2181/2 geometry, this left-hand tap provides consistent thread form and tolerance class 6H for reliable fit. It is suitable for manual or machine tapping operations in steel and comparable materials where a left-hand thread is required, commonly used in maintenance, metal fabrication and assembly tasks.

Advantages

The HSS material ensures wear resistance and toughness during repeated tapping operations. DIN-2181/2 geometry gives predictable chip control and thread accuracy for 6H tolerance class. Left-hand orientation simplifies application where opposing rotational directions are necessary or where components require left-threaded fastening. The design supports both hand taps and machine tapping, offering versatility across workshop processes.

Suitable for

• Cutting internal left-hand metric threads M10 x 1.25 in steel and similar metals
• Maintenance and repair tasks requiring left-hand threads
• Machine shop and assembly operations with machine or hand tapping
• Fabrication of components where reverse-threaded fasteners are used

Key specifications

• Thread form: Metric ISO left-hand thread
• Nominal size and pitch: M10 × 1.25 mm
• Material: High-speed steel (HSS)
• Tolerance class: 6H
• Standard/geometry: DIN-2181/2 (NGMM/2 style)
• Application mode: Suitable for manual and machine tapping

How to use

Select the correct drill size for the M10×1.25 tap and prepare the hole with appropriate alignment. Secure the workpiece and use suitable cutting fluid for steel to improve tool life and chip evacuation. For hand tapping, apply steady, controlled torque and reverse slightly at intervals to break chips. For machine tapping, set the correct spindle speed and feed matching material and tap geometry, and ensure proper support and alignment to avoid tap breakage. Inspect the produced thread for conformity to required fit and clean chips from the hole before assembly.

Usage recommendations

Use appropriate cutting lubricant for steel, avoid excessive side loads, and choose tapping speeds and feed rates suitable for HSS taps in steel to maximize tool life. When tapping blind holes, withdraw regularly to clear chips; when tapping deep or difficult materials, consider using progressive pecking cycles or machine tapping with break-out capability.