M18 DIN 376 Spiral Point Tap HSSE Cobalt 6H Through Hole Machine Tap

Threading through holes in tough materials demands a tap that resists wear and evacuates chips forward. This M18 spiral point tap cuts clean metric coarse threads with a 2.5 mm pitch, pushing chips ahead of the tool so they exit the hole without clogging the flutes. The cobalt-enriched HSSE steel withstands high heat and abrasion, making it a reliable choice for production runs in steel, alloy steels, cast iron, and non-ferrous metals.

Who is it for

Machinists, maintenance crews, and fabricators who need consistent 6H tolerance threads in through holes. Ideal for CNC tapping centers, drill presses, or manual tapping in general engineering and repair work.

Main features

• Spiral point (C chamfer) geometry drives chips forward for through-hole tapping.
• HSSE cobalt steel delivers high hot hardness and edge retention.
• Metric coarse M18 x 2.5 mm thread to DIN 376 and tolerance class 6H.
• Right-hand cutting direction for standard machine or hand tapping.
• Uncoated bright finish for general-purpose use on a wide range of materials.

Specifications

• Thread standard: Metric Coarse
• Nominal thread size: M18
• Thread pitch: 2.5 mm
• Tap standard: DIN 376
• Chamfer form: C (spiral point, 2-3 threads lead)
• Thread tolerance class: 6H
• Material: HSSE (high-speed steel with cobalt)
• Application type: Machine tapping
• Hole type: Through hole
• Cutting direction: Right-hand cut
• Overall length (L1): 110 mm
• Thread length (L2): 35 mm
• Shank diameter (d2): 14 mm
• Square drive size (a): 11 mm
• Flute type: Spiral point
• Surface treatment: Uncoated

Tips

Use a suitable tapping lubricant to prolong tool life and improve thread finish. Ensure the tap is aligned perpendicular to the workpiece to avoid breakage. For optimal performance, select the correct drill size for the pre-tapped hole based on the thread pitch.