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Description
Material HSS
Thread size M14
Number of pieces3 pcs
Tolerance 6H ISO2
Technical data for the M14 hand tap
| Technical data | |
|---|---|
| Thread Diameter d1 | M14 |
| Thread Pitch P | 2 mm |
| Overall Length l1 | 80 mm |
| Flute Length l2 | 26 mm |
| Shank Diameter d2 | 11 mm |
| Square Drive Width Across Flats a | 9 mm |
| Tap Drill Hole | 12 mm |
Roughing, intermediate, and finishing taps – how much material each removes
Division of work in the 1–2–3 set
The M14 x2 thread is formed in the wall of a hole with a diameter of 12 mm. The thread groove extends 1 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 M14 hole – sequence 1, 2, 3
Hand tapping step by step
Thread M14 x2 in five steps
ØDrilling
Drill bit 12 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 14 mm minus pitch 2 mm gives 12 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 21 mm, or 1.5 times the thread diameter (1.5 x 14 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 M14 screw.
M14 HSS DIN 352 hand tap – 3-piece set for medium-sized threads
The M14 hand tap set is a professional set of three tools for cutting internal threads with a diameter of 14 mm and a pitch of 2 mm. M14 HSS hand taps are widely used in the automotive industry, machinery manufacturing, and hydraulics, where M14 threads are found in housings, fastening components, and system connections.
Key benefits of the M14 tap set
- 3-piece set (roughing, intermediate, and finishing taps) – progressive cutting ensures high thread quality and protects the tools
- Popular M14 size – for fastenings in automotive applications, hydraulics, and machine housings
- HSS high-speed steel – enables machining of carbon steels, cast iron, and aluminum with strengths up to 800 MPa
- Tolerance 6H according to DIN 352 – precise fit with screws and nuts of tolerance class 6g
- 9 mm square shank – compatible with size 3 tap wrenches
The 3-piece M14 hand tap set is suitable for automotive repair shops, construction machinery service centers, and hydraulic workshops. Use a drill bit with a diameter of 12 mm to drill the hole for an M14 thread. Use tapping oil for optimal thread surface finish.
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
Use a 12 mm drill bit for an M14 thread with a pitch of 2 mm. Formula: diameter minus pitch (14 - 2 = 12 mm).
M14 threads are found in automotive applications, industrial hydraulics, and machine housings. This is a popular size for moderate mechanical loads.
M14 and M16 have the same pitch of 2 mm but different diameters. M14 is lighter and used where space is limited. M16 carries heavier loads.
Product accessories
Tapered countersink 16.5/90 DIN 335 C HSS
Reference: 11247 In stock > 10 items
€9.74
€11.98 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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