Hand Tap 2-piece FANAR M20 x 1.50 DIN-2181 HSS, thread M20x1.5 (6H)

Hand Tap 2-piece FANAR M20 x 1.50 DIN-2181 HSS is a two-piece manual tap set designed for cutting internal metric threads M20 x 1.50 (6H). Manufactured to DIN‑2181 standards from high-speed steel (HSS), the set contains a chamfer (starter) tap and a plug (second) tap to enable progressive threading and improve chip control during manual tapping operations. The set is intended for use in metalworking and maintenance where consistent, standard-compliant M20x1.5 internal threads are required.

Advantages

The two-piece design separates the cutting stages: the chamfer tap creates the initial thread profile and eases entry while the plug tap completes the thread to the required tolerance, which helps reduce breakage risk and extends tool life. HSS construction offers good toughness and wear resistance for general-purpose manual tapping in steels, non-ferrous metals and some softer alloys. Conformance to DIN‑2181 and the metric thread profile M20 x 1.50 (6H) ensures compatibility with standard fasteners and predictable fit.

Suitable for

• Manual tapping of M20 x 1.50 internal threads in metal components
• Maintenance and repair tasks requiring standard metric threads
• Workshops performing small-series or occasional threading by hand
• Materials such as mild steel, aluminum alloys and other machinable metals

When it may not be suitable

This manual two-piece HSS tap set is not intended for high-volume production where machine tapping or spiral-fluted, coated taps would give higher productivity and longer life. It may also be less suitable for very hard or abrasive materials, hardened steels, or highly gummy materials unless appropriate lubrication and slow cutting conditions are used. For blind holes with difficult chip evacuation requirements, specialized spiral-point or spiral-fluted taps may perform better.

Key specifications

• Thread size and pitch: M20 x 1.50
• Thread tolerance/fit: metric 6H
• Standard: DIN‑2181
• Tool material: High‑Speed Steel (HSS)
• Set composition: 2 pieces — chamfer (starter) tap and plug (second) tap
• Application: manual hand tapping

How to use

Mark and drill the hole to the recommended drill diameter for an M20 x 1.50 internal thread, secure the workpiece, and apply an appropriate cutting lubricant. Start with the chamfer (starter) tap, aligning it square to the hole and turning it by hand using a suitable tap wrench. Advance the tap slowly, reversing slightly at intervals to break chips and clear the flute. Once the chamfer tap has progressed, switch to the plug (second) tap to complete the thread to full depth and tolerance. Clean chips from the flutes regularly and finish by removing burrs and checking thread fit with a mating bolt.

What to consider before purchase

• Confirm the required thread size is M20 x 1.50 and fit class 6H for compatibility with existing fasteners
• Ensure the material to be tapped is suitable for HSS tools and that correct lubricant and drill size are available
• Decide whether manual two-piece taps meet production volume needs or if machine or coated taps are preferable
• Verify you have an appropriate tap wrench and chip-clearing procedure for safe manual tapping

Usage recommendations

Use light, steady pressure and frequent reverse rotations to break and evacuate chips. Apply a suitable cutting fluid for the workpiece material and inspect taps for wear before each use. For blind holes or materials prone to clogging, consider stepping back frequently to clear chips or using specialized taps designed for those conditions.