| Size | P (mm) Pitch 螺距 | L (mm) 总长 | Lc (mm) 刃长 | Chamfer 切削锥 | d (mm) 柄径 | K (mm) 方头尺寸 | n 槽数 | Hole (mm) 底孔直径 | Tap limits 公差等级 |
| DIN371 |
|
| M3 | 0.5 | 56 | 11 | 5P | 3.5 | 2.7 | 3 | 2.5 | 6H |
| M4 | 0.7 | 63 | 13 | 5P | 4.5 | 3.4 | 3 | 3.3 |
| M5 | 0.8 | 70 | 16 | 5P | 6 | 4.9 | 3 | 4.2 |
| M6 | 1 | 80 | 19 | 5P | 6 | 4.9 | 3 | 5 |
| M8 | 1.25 | 90 | 22 | 5P | 8 | 6.2 | 3 | 6.75 |
| M10 | 1.5 | 100 | 24 | 5P | 10 | 8 | 3 | 8.5 |
| DIN376 |
|
| M12 | 1.75 | 110 | 29 | 5P | 9 | 7 | 4 | 10.25 | 6H |
| M14 | 2 | 110 | 30 | 5P | 11 | 9 | 4 | 12 |
| M16 | 2 | 110 | 32 | 5P | 12 | 9 | 4 | 14 |
| M18 | 2.5 | 125 | 34 | 5P | 14 | 11 | 4 | 15.5 |
| M20 | 2.5 | 140 | 34 | 5P | 16 | 12 | 4 | 17.5 |
| M22 | 2.5 | 140 | 34 | 5P | 18 | 14.5 | 4 | 19.5 |
| M24 | 3 | 160 | 38 | 5P | 18 | 14.5 | 4 | 21 |
DIN371 & DIN376 HSSE‑Co5% Spiral Point Form‑B Machine Tap is industrial‑grade machine tap manufactured following DIN371 (solid shank) and DIN376 (reduced shank) standards.
Fabricated from HSSE‑Co5% cobalt‑alloy high‑speed steel with high‑precision full grinding process. Form‑B spiral‑point (gun‑nose) flute design directs chips forward out of through holes, preventing chip clogging inside the threaded hole. Excellent heat‑resistance and hardness make this tap well‑suited for continuous CNC mass‑production threading for through holes in carbon steel, alloy steel and stainless steel parts.
Core Specifications
Industry Standard: DIN371 / DIN376
Material: HSSE‑Co5% (5% Cobalt High‑Speed Steel)
Tool Type: Spiral Point Machine Tap, Form‑B
Manufacturing Process: High‑end precision grinding
Chip Direction: Forward chip ejection (for through‑hole only)
Application: CNC machine tapping, through‑hole threading
Suitable Material: Carbon Steel, Alloy Steel, Stainless Steel
Key Features
✅ Complies with DIN371 & DIN376 Standard: Two standard specifications for different shank requirements, stable thread dimensional accuracy
✅ HSSE‑Co5% Cobalt Substrate: Superior red‑hardness and heat resistance for long‑run machining
✅ Form‑B Spiral‑Point Geometry: Forward chip removal, avoid chip jamming inside through holes
✅ High‑end Precision Grinding: Sharp cutting edges, smooth thread surface finish
✅ Designed for Through‑hole Tapping: Optimized for CNC machine tapping, batch production
✅ Green ring identification mark: Easy quick tool recognition on tool rack
Application Scenarios
Widely used in CNC machining workshops, auto‑parts manufacturing, general hardware production. Mainly for threading through holes in carbon steel, alloy steel and stainless‑steel workpieces.
Usage Note
Recommended to use proper tapping cutting fluid. This spiral‑point tap is primarily intended for through‑hole processing, not suitable for blind holes. Set reasonable spindle speed to avoid overheating and premature tool wear.
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