Model NO.: DIN 376 HT
Chamfer Type: C5 (5-7 Threads)
Flute Type: Straight Flute
Coating: Ticn/Tin/Nocated
Limit: 6h
Flute: 3
Overall Length: 70 Mm
Flute Length: 13 Mm
Shank Diameter: 3.5 Mm
Tang: 2.7 Mm
Specification: M4.5
Trademark: HEGONG/OEM
DIN376 Straight Flute Tap
Metric Thread Compliance:
Designed for DIN 376 standard metric threads (e.g., M8×1, M10×1.25), ensuring high-precision thread profiles.
Straight Flute Design:
Chip Evacuation: Optimized for both through holes and blind holes, threading in continuous machining operations.
Rigidity: Superior stability compared to spiral taps, ideal for hard materials.
Material & Coating:
HSS-E (High-Speed Steel with Cobalt): Hardness up to 63-65 HRC, enhanced wear resistance for long tool life.
Optional TiN/TiCN Coating: Reduces friction and extends durability in high-temperature applications.
High-Speed Machining:
Suitable for CNC machines and automatic lathes at speeds up to 15 m/min.
Thread Quality:
Ground Thread Profile: Achieves 6H tolerance class for critical applications.
TYPICAL APPLICATION SCENARIOS
Precision Engineering:
Threading hydraulic valve blocks, precision gears, and bearing housings in alloy steel (e.g., 42CrMo).
Automotive Manufacturing:
Tapping engine cylinder head bolts (threads for high clamping force) and transmission shafts.
Heavy Machinery:
Producing high-strength fasteners and flange connections in carbon steel (e.g., S45C).
Aerospace Components:
Threading landing gear parts and actuator systems requiring DIN standard threads.
General Metalworking:
High-volume production of metric threaded components in workshops with automated equipment.


| Size | L | Lc | Limit | d | k | Flute |
| M3 | 56 | 9 | 6H | 2.2 | – | 2.5 |
| M3.5 | 56 | 11 | 6H | 2.5 | 2.1 | 2.9 |
| M4 | 63 | 12 | 6H | 2.8 | 2.1 | 3.3 |
| M4.5 | 70 | 13 | 6H | 3.5 | 2.7 | 3.7 |
| M5 | 70 | 13 | 6H | 3.5 | 2.7 | 4.2 |
| M6 | 80 | 15 | 6H | 4.5 | 3.4 | 5 |
| M7 | 80 | 15 | 6H | 5.5 | 4.3 | 6 |
| M8 | 90 | 18 | 6H | 6 | 4.9 | 6.8 |
| M9 | 90 | 18 | 6H | 7 | 5.5 | 7.8 |
| M10 | 100 | 20 | 6H | 7 | 5.5 | 8.5 |
| M11 | 100 | 20 | 6H | 8 | 6.2 | 9.5 |
| M12 | 110 | 23 | 6H | 9 | 7 | 10.2 |
| M14 | 110 | 25 | 6H | 11 | 9 | 12 |
| M16 | 110 | 25 | 6H | 12 | 9 | 14 |
| M18 | 125 | 30 | 6H | 14 | 11 | 15.5 |
| M20 | 140 | 30 | 6H | 16 | 12 | 17.5 |
| M22 | 140 | 30 | 6H | 18 | 14.5 | 19.5 |
| M24 | 160 | 36 | 6H | 18 | 14.5 | 21 |