| 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 complies with two European industrial standards: DIN371 (solid shank) and DIN376 (reduced shank). Manufactured from HSSE‑Co5% cobalt‑alloy high‑speed steel via high‑end grinding process.
Form‑B spiral‑point flute design pushes chips forward out of through holes, effectively avoiding chip accumulation and clogging inside threaded holes. Sharp ground cutting edges deliver smooth and precise thread surface. Outstanding red‑hardness enables stable continuous‑run performance for CNC batch production. The green color ring on shank provides fast visual recognition in tool storage cabinets. Ideal choice for threading through‑holes on carbon steel, alloy steel and stainless‑steel workpieces.
Core Specifications
Industry Standard: DIN371 (Solid Shank) / DIN376 (Reduced Shank)
Raw Material: HSSE‑Co5% (5% Cobalt High‑Speed Steel)
Tool Type: Spiral Point Form‑B Machine Tap
Manufacturing Process: High‑end precision grinding
Chip Direction: Forward chip ejection (only for through‑hole)
Marking: Green ring on shank for quick identification
Application: CNC machine tapping, through‑hole threading
Suitable Material: Carbon Steel, Alloy Steel, Stainless Steel
Key Features
✅
Two DIN Standards Available: DIN371 solid shank and DIN376 reduced shank for diverse tooling requirements
✅
HSSE‑Co5% Cobalt Alloy Steel: Superior red‑hardness and heat‑resistance for long service life under heavy‑duty tapping
✅
Form‑B Spiral‑Point Geometry: Forward chip evacuation, prevent chip jamming for through‑hole tapping
✅
High‑End Grinding Process: Ultra‑sharp cutting edges, consistent thread dimensional accuracy and fine thread finish
✅
Green Ring Identification: Convenient visual sorting in tool room
✅
Optimized for CNC Batch Production: Reliable performance for industrial‑volume tapping jobs
Application Scenarios
Commonly used in CNC machining workshops, automotive component manufacturing, general hardware and mechanical fabrication. Mainly applied for through‑hole tapping operations on carbon steel, alloy steel and stainless‑steel parts.
Usage Notice
Apply suitable tapping cutting fluid during machining process. This spiral‑point tap is intended for through‑hole only, not recommended for blind‑hole tapping. Please configure proper spindle speed and feed rate to reduce overheating and extend tap lifespan.
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