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Machine tap M20x1 DIN 374 B HSSE
0000006995
Thread size: M20x161 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
€36.25 tax inc.
Net price: €29.47
Description
Material HSSE
Thread size M20x1
ChamferB (3.5–5.5) threads
Standard DIN 374
Technical data for the M20x1 machine tap
| Technical Data | |
|---|---|
| Nominal Diameter d1 | M20x1 |
| Thread Pitch P | 1 mm |
| Overall Length l1 | 125 mm |
| Flute Length l2 | 27 mm |
| Shank Diameter d2 | 16 mm |
| Square Drive Size a | 12 mm |
| Tap Drill Diameter | 19 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 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 mm/rev, equal to the pitch of the M20x1 thread.
M20x1 metric fine machine tap – HSSE for precision adjustments
The M20x1 metric fine machine tap from the HSSE series is designed for cutting internal threads with a pitch of 1 mm in applications requiring precise adjustment and high connection strength. Made from high-speed steel with 5% added cobalt, it guarantees a hardness of 65-67 HRC and long cutting edge life, even when machining difficult-to-machine materials. The M20x1 metric fine thread combines high adjustment precision with good mechanical strength, offering a compromise between coarse threads and threads with very fine pitches.
Key features of the M20x1 metric fine thread machine tap
- Fine thread with a 1 mm pitch provides 2.5 times the adjustment precision of the M20x2.5 coarse thread while maintaining good mechanical strength of the connection
- Increased resistance to self-loosening thanks to a finer pitch and a larger helix angle compared with a coarse thread
- HSSE steel with 5% cobalt guarantees a hardness of 65-67 HRC and heat resistance up to 650°C, extending tool life when machining alloy steels
- Tolerance 6H according to DIN 374 ensures precise thread production and full interchangeability with standard-grade fasteners
- Material versatility covering structural steels up to 800 MPa, austenitic stainless steels 304/316, gray cast iron, and aluminum
- Recommended tap drill diameter 19 mm for the M20x1 metric fine thread ensures an optimal percentage of thread engagement and minimal tool load
The M20x1 metric fine thread machine tap is used in hydraulic power systems, industrial pneumatics, and machine building where precise adjustment and high-strength threaded connections are required. Form B with straight flutes directs chips forward when tapping through holes. Cooling with an emulsion containing 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 | 80-318 |
| MStainless steel | 5-10 | 80-159 | 80-159 |
| KCast iron | 5-15 | 80-239 | 80-239 |
| NAluminum | 10-25 | 159-398 | 159-398 |
Thread preparation M20x1 in a through hole
1 Spot drilling
NC spotting drill 90°
2 Drilling
Ø 19 mm
3 Tapping
M20x1
✓ 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 recommended tap drill diameter for the M20x1 metric fine thread is 19 mm. Accurate hole preparation ensures a full thread profile and minimizes the load on the tap.
The M20x1 thread is used in hydraulic power systems, pneumatics, machine building, and wherever precise adjustment combined with high mechanical strength of the connection is required.
Yes, the M20x1 HSSE tap with 5% cobalt is suitable for machining 304/316 austenitic stainless steels. Flood cooling with an emulsion containing EP additives at a concentration of 8-10% is recommended.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| 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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