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Machine Tap M20x1.5 DIN 374 B HSSE
0000005926
Thread size: M20x1,561 sizes of this tap
M5x0,5M10x1M10x1,25M11x0,75M12x1M12x1,25M12x1,5M14x1M14x1,25M14x1,5M15x1M15x1,25M15x1,5M16x1M16x1,5M17x1M18x1M18x1,5M18x2M20x0,75M20x1M20x1,25M20x1,5M20x2M22x1,5M22x2M24x1M24x1,5M24x2M25x1M25x1,5M25x2M26x1,5M27x1,5M28x1,5M30x1,5M30x2M30x3M32x1M32x1,5M32x2M33x1,5M33x2M35x1,5M36x1,5M36x2M36x3M38x1,5M39x1,5M39x2M40x1,5M42x1,5M42x2M42x3M48x1,5M50x2M52x2M56x3M60x3M64x3M64x4
€33.99 tax inc.
Net price: €27.63
Description
Material HSSE
Thread size M20x1.5
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M20x1.5 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M20x1.5 |
| Thread Pitch P | 1.5 mm |
| Overall Length l1 | 125 mm |
| Flute Length l2 | 24 mm |
| Shank Diameter d2 | 16 mm |
| Square Drive Size a | 12 mm |
| Tap Drill Diameter | 18.5 mm |
| Chamfer | B (3.5÷5.5) P |
| Thread tolerance | 6H |
How the type B through-hole chamfer pushes chips down the hole
Chips exit at the bottom instead of returning through the thread
The form B chamfer for through holes has a chip breaker at the tip of the tap – an angled cut in the cutting edges. The chip breaker directs the chip down the hole, ahead of the tap tip. The chip curls into a coil, breaks into short pieces and exits the hole on the other side of the workpiece. The threads already cut remain clean because the chip does not pass through them on its way up. The M20x1.5 tap has a reduced shank according to DIN 374: diameter 16 mm, square size 12 mm.
1
Straight flute – chips do not enter it; the flute carries lubricant to the cutting edges.
2
The chip breaker at the tip of the tap directs chips down the hole.
3
The tap rotates clockwise to cut a right-hand thread.
4
B chamfer: 3.5–5.5 incomplete threads on the entry taper.
5
The chips break into segments: individual pieces at the top of the hole, with progressively more farther down. They fall out below the workpiece.
6
Feed 1.5 mm/rev, equal to the pitch of the M20x1.5 thread.
M20x1.5 machine tap for metric fine threads – HSSE for leak-tight connections
The HSSE tap series, designed for professional toolrooms, includes the cobalt M20x1.5 machine tap for metric fine threads. The 6H tolerance in accordance with DIN 374 guarantees the dimensional repeatability required when manufacturing industrial hydraulic and pneumatic components. Made of high-speed steel with 5% cobalt, the tool achieves a hardness of 65-67 HRC and heat resistance up to 650°C, significantly extending tool life when machining difficult-to-machine materials. The M20x1.5 metric fine thread has the most popular fine pitch for the M20 diameter.
Why choose the M20x1.5 metric fine thread machine tap
- Most popular fine pitch of 1.5 mm for the M20 diameter combines good adjustment precision with fast assembly and wide fastener availability
- Improved leak tightness of connections thanks to more threads per unit length, which is critical in industrial hydraulics and pneumatics
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and thermal resistance up to 650°C required when machining alloy and stainless steels
- Tolerance 6H according to DIN 374 ensures precise thread production and full interchangeability with standard-grade fasteners
- Compatibility with ER32 holders and tapping chucks with axial compensation for CNC machining centers
- Recommended tap drill diameter 18.5 mm for the M20x1.5 metric fine thread ensures an optimal percentage of thread engagement
The M20x1.5 machine tap for metric fine threads is used to manufacture valve blocks, pneumatic cylinders, and industrial valves and fittings where leak tightness and vibration resistance are required. The M20x1.5 metric fine thread is standard in high-pressure hydraulic and pneumatic connections. A coolant emulsion with EP additives at a concentration of 8-10% is recommended.
| Material | Cutting speed Vc [m/min] | Spindle speed n [rpm] | Feed f [mm/min] |
|---|---|---|---|
| PSteel | 5-20 | 80-318 | 120-477 |
| MStainless steel | 5-10 | 80-159 | 120-238 |
| KCast iron | 5-15 | 80-239 | 120-358 |
| NAluminum | 10-25 | 159-398 | 238-597 |
Thread preparation M20x1.5 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 18.5 mm
3 Tapping
M20x1.5
✓ Done!
Tolerance 6H
Standard: DIN 374 | Chamfer: B (straight) | Application: through holes
Tolerance 6H — metric thread tolerance classes
| Class | Accuracy | Application | Status |
|---|---|---|---|
| 4H / 4g | High | Precision connections, hydraulics | — |
| 6H / 6g | Standard | Machine building, general-purpose | SELECTED |
| 7H / 8g | Low | Large clearance, easy assembly | — |
6H = internal thread (nut, hole) | 6g = external thread (screw)
Frequently asked questions
The M20x1.5 thread is standard in industrial hydraulics due to its good leak tightness, high joint strength, and wide fastener availability. The pitch of 1.5 mm provides an optimal balance between precision and assembly speed.
The recommended tap drill diameter for the M20x1.5 metric fine thread is 18.5 mm. Accurate hole preparation ensures leak-tight hydraulic and pneumatic connections.
With proper cooling, the M20x1.5 HSSE tap produces 300-500 threads in structural steel and 150-250 threads in stainless steel. Dry operation reduces tool life by 30-40%.
Product accessories
HSSE 18.5 cobalt metal drill bit DIN 338
Reference: 13299 In stock > 10 items
€18.42
€22.66 brutto
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| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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