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Hand Tap M42X3 DIN 2181/2 6H HSS
10550
Thread size: M42x3172 sizes of this tap
M1x0,2M1,2x0,2M1,4x0,2M1,6x0,2M1,7x0,2M1,8x0,2M2x0,25M2,2x0,25M2,2x0,35M2,3x0,25M2,3x0,35M2,5x0,35M3x0,35M3,5x0,35M4x0,5M4,5x0,5M5x0,5M5,5x0,5M6x0,5M6x0,75M7x0,5M7x0,75M8x0,5M8x0,75M8x1M9x0,5M9x0,75M9x1M10x0,5M10x0,75M10x1M10x1,25M11x0,75M11x1M11x1,25M12x0,5M12x0,75M12x1M12x1,25M12x1,5M13x1M13x1,25M14x0,75M14x1M14x1,25M14x1,5M15x1M15x1,5M16x0,75M16x1M16x1,25M16x1,5M17x1M17x1,5M17x2M18x0,75M18x1M18x1,25M18x1,5M18x2M19x1M19x1,5M20x0,75M20x1M20x1,25M20x1,5M20x2M21x1,5M22x1M22x1,25M22x1,5M22x1,75M22x2M24x1M24x1,5M24x2M25x1M25x1,5M25x2M26x1M26x1,25M26x1,5M26x2M27x1M27x1,5M27x2M28x1M28x1,5M28x2M30x1M30x1,5M30x2M30x2,5M30x3M32x1,5M32x2M32x3M33x1,5M33x2M33x3M34x1,5M34x2M35x1,5M36x1M36x1,5M36x2M36x3M38x1,5M38x2M38x3M39x1M39x1,5M39x2M39x3M40x1,5M40x2M40x3M42x1,5M42x2M42x3M42x4M45x1,5M45x2M45x3M45x4M46x1,5M46x2M48x1,5M48x2M48x3M48x4M50x1,5M50x2M50x3M52x1M52x1,5M52x2M52x3M52x4M55x2M55x3M56x1,5M56x2M56x3M56x4M58x2M58x4M60x1,5M60x2M60x3M62x1,5M62x2M62x3M62x4M64z1,5M64x2M65x2M65x4M68x1,5M68x2M68x3M68x4M70x1,5M70x2M72x1,5M72x4M75x1,5M75x2M76x1,5M80x1,5M85x2M90x2
€200.68 tax inc.
Net price: €163.16
Description
Technical data for the M42x3 hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M42 |
| Thread pitch P mm | 3 mm |
| Overall length l1 | 165 mm |
| Flute length l2 | 55 mm |
| Shank diameter d2 | 28 mm |
| Square drive size a | 22.4 mm |
| Tap drill diameter | 39 mm |
| Thread angle G | 60° |
| Tap tolerance | ISO2 6H |
Roughing tap and finishing tap – how much material each removes
Division of work in the 1–2 set
The M42x3 thread is cut into the wall of a hole with a diameter of 39 mm. The thread groove extends 1.5 mm into the wall. A single tap would have to cut the entire groove at once, requiring substantial hand torque and risking breakage. The set divides this work into two passes.
The drawing shows the entire set in operation. Both taps have the same shank and the same length. They differ in their chamfer, the tapered tip: No. 1 has a chamfer spanning 8 threads, while No. 2 spans only 2 threads. The detail windows at the hole wall show how the thread groove deepens after each tap.
| Tap | Chamfer | Chamfer angle | Material removed | How it works in the hole |
|---|---|---|---|---|
| No. 1 – roughing tap | long, 8 threads | 5° | the main portion of the groove | enters smoothly and establishes thread alignment |
| No. 2 – finishing tap | short, 2 threads | 20° | the remainder, to the full profile | follows the cut threads and produces the full 6H profile |
How to distinguish the taps in the set
The chamfer on No. 1 is 4 times as long as the chamfer on No. 2 — the difference is immediately visible when you place them side by side. No. 1 has an incomplete thread profile; only No. 2 has the full profile. The number is also indicated on the shank: No. 1 has one ring, No. 2 has none. Keep the set together and always start with the roughing tap.
How to tap an M42x3 hole – sequence 1, 2
Hand tapping step by step
Thread M42x3 in four steps
ØDrilling
Drill bit 39 mm
1Roughing tap
Chamfer 8 threads
2Finishing tap
Chamfer 2 threads
✓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 42 mm minus pitch 3 mm gives 39 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 105 mm, or 2.5 times the thread diameter (2.5 x 42 mm, shown as 2.5D in the drawing). Drill the hole deeper than the thread. The finishing tap has a chamfer spanning 2 threads, so approx. 2 incomplete threads remain near the bottom. The extra depth below the thread accommodates them along with the chips.
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 – the finishing tap produces the full profile
Back out the roughing tap and remove chips from the hole. Screw the finishing tap into the cut threads by hand – it should engage them on its own. Continue turning at the same rhythm as with the roughing tap. The finishing tap removes the remaining material and cuts the groove to the full profile within tolerance 6H. When it screws in smoothly all the way, the thread is complete – check it with an M42x3 screw.
M42x3 fine-thread hand taps
M42X3 Hand Tap DIN 2181/2 6H HSS is designed to cut an M42 metric fine thread with a pitch of three millimeters in steels with strengths up to eight hundred megapascals; a two-stage operating sequence ensures a stable machining process while maintaining a class six H fit.
Technical parameters: nominal diameter forty-two millimeters; pitch three millimeters; sixty° profile according to ISO 68-1; internal thread tolerance class 6H according to ISO 965; right-hand design; straight flutes directing chips out of the cutting zone. Precision-ground high-speed steel (HSS) reduces microchipping and maintains low edge microroughness. The arrangement according to DIN 2181/2 (roughing I and finishing II) balances torsional loads and helps maintain axial alignment; recommended tap drill: thirty-nine millimeters. In assembly practice, clear identification of the individual taps and an orderly pass sequence are supported by M42x3 Hand Tap Set.
- Uniform profile formation — dividing the operation into roughing and finishing stages dampens torque fluctuations and reduces the risk of galling along the entire profile length.
- Longer edge life — ground high-speed steel (HSS) reduces abrasion and material adhesion, extending intervals between resharpening.
- Verifiable 6H precision — pitch diameter control helps achieve a GO / NO-GO result that meets class six H requirements.
- Operational consistency — unambiguous I/II markings organize the sequence and facilitate inspection during machining.
Compliance with DIN 2181/2 (construction), ISO 68-1 (profile geometry), and ISO 965 (tolerances) guarantees compatibility with measuring equipment; in combination with Hand Tap Set M42 a predictable profile and repeatable dimensions are achieved in one-off and small-batch work.
Stages of cutting an M42x3 thread with a 2-piece set: roughing tap and finishing tap
Frequently asked questions
Drill to 39 mm (diameter 42 mm minus pitch 3 mm) to achieve the correct thread engagement in class 6H.
Yes, the set can be used in both through holes and blind holes, in accordance with DIN 2181 and class 6H.
High-speed steel (HSS) provides high durability, abrasion resistance, and stable operation even under demanding conditions.
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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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