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Description
Material HSSE
Thread size M6
Number of pieces3 pcs
Tolerance 6H ISO2
Technical data for the M6 hand tap
| Technical data | |
|---|---|
| Thread Diameter d1 | M6 |
| Thread Pitch P | 1 mm |
| Overall Length l1 | 56 mm |
| Flute Length l2 | 16 mm |
| Shank Diameter d2 | 6 mm |
| Square Drive Width Across Flats a | 4.9 mm |
| Tap Drill Hole | 5 mm |
Roughing, intermediate, and finishing taps – how much material each removes
Division of work in the 1–2–3 set
The M6 x1 thread is formed in the wall of a hole with a diameter of 5 mm. The thread groove extends 0.5 mm into the wall. A single tap would have to cut the entire groove at once – by hand, this creates high resistance and a risk of breakage. The set divides this work into three layers.
The drawing shows the entire set in operation. All three taps have the same shank and the same length. They differ in chamfer length: No. 1 has a taper spanning 7–10 threads, while No. 3 spans only 1–2 threads. The detail views at the hole wall show how the thread groove deepens after each tap.
| Tap | Chamfer | Material removed | How it works in the hole |
|---|---|---|---|
| No. 1 – roughing tap | long, 7–10 threads | approx. 60% | enters smoothly and establishes thread alignment |
| No. 2 – intermediate | medium, 3–5 threads | approx. 30% | screws into the previously cut threads and starts cutting only deeper in the hole |
| No. 3 – finishing tap | short, 1–2 threads | approx. 10% + sizing | turns easily and produces the full 6H profile |
How to identify the tap numbers in the set
The chamfer is the tapered end of the tap. No. 1 has the longest chamfer and No. 3 the shortest – the difference is immediately visible when they are placed side by side. No. 1 and No. 2 have shallower thread profiles; only No. 3 has the full profile. The number can also be identified on the shank: No. 1 has one ring, No. 2 has two, and No. 3 has none. Keep the set together and always start with the roughing tap.
How to tap an M6 hole – sequence 1, 2, 3
Hand tapping step by step
Thread M6 x1 in five steps
ØDrilling
Drill bit 5 mm
1Roughing tap
Removes approx. 60%
2Intermediate
Removes approx. 30%
3Finishing tap
Removes approx. 10%
✓Finished thread
Tolerance 6H
Turning sequence: half a turn clockwise, a quarter turn counterclockwise | Between taps: remove chips from the hole
Start with the hole. The drill diameter is easy to calculate: thread diameter 6 mm minus pitch 1 mm gives 5 mm. An undersized hole is a common cause of a tap twisting off in the workpiece.
Through hole or blind hole – how deep to drill
The set taps both types of holes. In a through hole, the thread extends through the full material thickness. In a blind hole, cut the thread to 9 mm, or 1.5 times the thread diameter (1.5 x 6 mm, shown as 1.5D in the drawing). Drill the hole deeper than the thread. The clearance below the thread accommodates chips and the finishing tap chamfer.
No. 1 – the roughing tap establishes thread alignment
Fit the roughing tap in the tap wrench and position it perpendicular to the surface. Check the angle from two sides, for example with a square. Turn half a turn clockwise, then a quarter turn counterclockwise. Reversing breaks the chip into short pieces – a slight crunch is normal. The first threads determine whether the thread will be straight.
No. 2 and No. 3 – deepening and full profile
Unscrew the roughing tap and remove chips from the hole. Screw the intermediate tap by hand into the previously cut threads – it should engage them naturally. It turns easily at first and starts cutting only deeper in the hole. The finishing tap enters with almost no resistance and cuts the final portion of the profile only at the end. When it screws smoothly all the way in, the thread is ready – check it with an M6 screw.
M6 HSSE DIN 352 hand tap – 3-piece set for precision tapping of stainless steels
The M6 HSSE hand tap set is a professional set of three tools for cutting internal threads with a diameter of 6 mm and a pitch of 1 mm in difficult-to-machine materials. M6 hand taps made of HSSE cobalt high-speed steel and conforming to DIN 352 combine the popular M6 size with the strength required for working with stainless steels, making them essential equipment in the food and medical industries.
Key advantages of the M6 HSSE tap set
- 3-piece set (roughing, intermediate, and finishing taps) – cutting in three stages ensures precision at a small diameter
- HSSE cobalt steel (5% Co) – extended tool life in austenitic and ferritic steels
- Most popular M6 size – the predominant thread in medical, food service, and laboratory equipment
- Tolerance 6H according to DIN 352 – precise fit with M6 screws of tolerance class 6g
- Wear resistance – cobalt increases cutting edge hardness at high temperatures
The M6 HSSE hand tap set is suitable for medical equipment manufacturing, laboratories, and food processing plants. To drill the hole for an M6 thread, use a drill bit with a diameter of 5 mm. Use tapping oil and work slowly, reversing the tool every half turn.
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
For an M6 thread with a pitch of 1 mm, use a 5 mm drill bit. Cobalt drill bits are recommended for stainless steel.
Yes, 304 steel (austenitic) generates high temperatures during cutting. HSSE significantly extends tool life.
Chlorinated oils or specialized pastes for stainless steels are best. Avoid regular machine oils – they provide poor lubrication for stainless steel.
Product accessories
Fanar's M6 HSSE INOX 6g DIN 22 568 tooling
Reference: 0000007078 In stock < 10 items
€11.84
€14.57 brutto
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| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
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