Tap FANAR M16 DIN-376C R40 (6H) HSSE HL INOX, thread-cutting tool for stainless steel

FANAR M16 DIN-376C R40 (6H) HSSE HL INOX is a machine tap designed for producing internal M16 threads to the DIN 376C standard. The tool features R40 flute geometry and a 6H tolerance class intended for precise metric threads. Manufactured from HSSE high-speed steel and finished with a high-longevity (HL) coating, this tap is specified for use in stainless and alloy steels, offering durability in production environments on tapping machines and CNC equipment.

Advantages

The HSSE construction combined with a high-longevity coating increases wear resistance and cutting life when working with hard or abrasive stainless and alloy steels. R40 flute geometry provides controlled chip formation and evacuation in through-hole and blind-hole tapping operations. The tool is ground to DIN 376C dimensions and 6H tolerance, supporting repeatable thread quality and interchangeability in assembly applications.

Suitable for

• Cutting internal M16 metric threads in stainless steels and high-strength alloys
• Use in tapping machines and CNC machining centres for batch or single-part production
• Through-hole and many blind-hole tapping applications where controlled chip flow is required

When it may not be suitable

This tap is optimised for stainless and alloy steels; it may not deliver optimal performance in soft non-ferrous materials (such as pure aluminium or copper) where different flute geometry and coatings are preferable. Extremely deep blind holes or interrupted threads requiring specialized spiral or thread-forming taps may require alternative tool types.

Key specifications

• Thread size and form: M16 metric internal thread to DIN 376C
• Tolerance class: 6H for standard fit
• Flute geometry: R40 for chip control
• Material: HSSE high-speed steel
• Coating/finish: high-longevity (HL) coating
• Application material: stainless steels and alloy steels (INOX specification)
• Intended use: machine tapping on tapping machines and CNC equipment

How to use

Select appropriate tapping speeds and feeds for HSSE tools and stainless materials, typically lower cutting speeds than for carbon steels to reduce work hardening. Use suitable cutting fluid for stainless steel to improve chip evacuation and reduce heat. Mount the tap securely in the machine spindle or tap holder, align carefully to the hole axis, and apply steady feed; retract periodically in blind-hole operations to clear chips. Verify thread dimensions after machining to ensure conformance with DIN 376C and 6H tolerance.

What to consider before purchase

• Confirm material compatibility: designed for stainless and alloy steels (INOX)
• Ensure machine capability for rigid tapping or synchronized spindle-feed operation
• Choose correct hole preparation (drill size and chamfer) for M16 DIN 376C threads
• Evaluate whether R40 flute geometry suits your chip-breaking and evacuation needs

Usage recommendations

Use conservative cutting speeds and steady feed when tapping stainless steel, keep the tap well lubricated, and replace the tool at the first sign of wear to maintain thread quality and prolong machine life.