HSSE 800 Machine Tap M12x1.25 Metric Fine DIN 374C Form C 6H Spiral Flute 40° Helix for Through Holes

Precision-ground machine tap for cutting M12x1.25 metric fine threads in through holes. The 40° spiral flute drives chips forward, preventing clogging and enabling uninterrupted high-volume threading in tough materials.

Advantages

Made from cobalt-enriched HSSE 800, this tap withstands high cutting temperatures and retains sharpness when machining stainless steel, alloy steels, and cast iron. The 40° helix angle ensures smooth chip evacuation, reducing the risk of tap breakage. Form C chamfer (2–3 threads) provides easy starting and accurate alignment, while 6H tolerance guarantees threads within standard limits for medium-fit applications.

Suitable for

• Through-hole threading in steel, stainless steel, and cast iron
• CNC machining centers and automated tapping operations
• General engineering, automotive, and metalworking industries
• Production runs requiring consistent thread quality and long tool life

Key specifications

• Thread standard: Metric Fine (M12x1.25)
• Manufacturing standard: DIN 374C
• Tool material: HSSE 800 (cobalt high-speed steel)
• Flute type: Spiral flute, 40° helix angle
• Chamfer form: Form C (2–3 threads)
• Thread tolerance: 6H
• Cutting direction: Right-hand
• Overall length: 110 mm; thread length: 25 mm
• Shank diameter: 9 mm; square drive: 7 mm
• Surface treatment: Uncoated (bright finish)

Recommendations

For optimal performance, use a suitable tapping fluid or cutting oil, especially when threading stainless steel or alloy steels. Ensure proper alignment and stable clamping to maximize tool life.