MASTERTAP M2.5 DIN 371C Spiral Flute Machine Tap HSSE-PM HL, 6H, 45° Helix, Through Holes

Unlike conventional taps that struggle with chip evacuation in through holes, the MASTERTAP M2.5 spiral flute tap uses a 45° helix to pull chips upward and away from the cutting zone. The powder-metallurgy HSSE-PM substrate with cobalt delivers exceptional wear resistance, while the HL high-lubricity treatment reduces friction and heat, allowing higher cutting speeds and extended tool life. Fully compliant with DIN 371C and tolerance class 6H, this tap produces precise, interchangeable metric coarse threads in steel, stainless steel, cast iron, and non-ferrous metals.

Highlights

• Powder metallurgy HSSE-PM with cobalt for superior hardness and edge retention
• 45° right-hand spiral flute for efficient chip removal in through holes
• HL high-lubricity coating minimizes friction, heat, and built-up edge
• DIN 371C standard with 6H tolerance for reliable metric coarse threads
• Optimized for steel, stainless steel, cast iron, and non-ferrous metals

In daily use

On the shop floor, this tap excels in high-volume CNC and manual operations. The spiral flute design prevents clogging and reduces the risk of tap breakage, while the HL treatment maintains thread quality even in work-hardening stainless steels. The 2.8 mm shank diameter and 2.1 mm square drive fit standard tap holders and collets for quick setup. With a thread length of 9 mm and overall length of 50 mm, it is ideal for through-hole threading applications.

Full specifications

• Thread Type: Metric Coarse
• Thread Size: M2.5
• Thread Pitch: 0.45 mm
• Tolerance Class: 6H
• Standard: DIN 371C
• Material: HSSE-PM (Powder Metallurgy High-Speed Steel with Cobalt)
• Application Type: Through Holes
• Helix Angle: 45°
• Flute Type: Spiral Flute (Right-Hand)
• Coating/Treatment: HL (High-Lubricity)
• Overall Length (L1): 50 mm
• Thread Length (L2): 9 mm
• Shank Diameter (d2): 2.8 mm
• Square Drive (a): 2.1 mm
• Cutting Direction: Right-Hand Cut
• Tool Type: Machine Tap
• Recommended Material: Steel, Stainless Steel, Cast Iron, Non-Ferrous Metals
• Series: MASTERTAP

Final note

For professionals who demand consistent thread quality and durability in demanding materials, the MASTERTAP M2.5 delivers performance that reduces downtime and tool changes.