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Hand Tap M38X2 DIN 2181/2 6H HSS
13079
Thread size: M38x2172 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
€142.42 tax inc.
Net price: €115.79
Description
Technical data for the M38x2 hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M38 |
| Thread pitch P mm | 2 mm |
| Overall length l1 | 125 mm |
| Flute length l2 | 40 mm |
| Shank diameter d2 | 28 mm |
| Square drive size a | 22 mm |
| Tap drill diameter | 36 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 M38x2 thread is cut into the wall of a hole with a diameter of 36 mm. The thread groove extends 1 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 M38x2 hole – sequence 1, 2
Hand tapping step by step
Thread M38x2 in four steps
ØDrilling
Drill bit 36 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 38 mm minus pitch 2 mm gives 36 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 95 mm, or 2.5 times the thread diameter (2.5 x 38 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 M38x2 screw.
M38x2 fine-thread hand taps
M38X2 Hand Tap DIN 2181/2 6H HSS cuts M38 metric fine threads with a pitch of two millimeters in steels up to eight hundred megapascals, ensuring stable cutting and controlled class six H fit. The sixty° profile to ISO 68-1 and construction compliant with DIN 2181/2 guarantee repeatable thread geometry in workshop and short-run machining.
Nominal diameter thirty-eight millimeters; pitch two millimeters; right-hand cutting; straight flutes promoting predictable chip evacuation. The two-piece design — first (starter) and second (finishing) taps — distributes torsional loads evenly and supports axial alignment. The ground high-speed steel version maintains low edge microroughness and reduces microchipping. Recommended tap drill: thirty-six millimeters; dimensional verification with GO / NO-GO thread ring gauges to ISO 965. At the workstation, the process is organized by M38x2 Hand Tap Set, simplifying tap identification and changeover between passes.
- Smooth thread cutting — dividing the work into starting and finishing stages reduces torsional vibration and the risk of galling.
- Cutting edge durability — ground high-speed steel maintains low microroughness, slowing edge dulling.
- Repeatable 6H accuracy — pitch diameter control helps ensure a successful thread ring gauge check.
- Order and repeatability — the use of M38x2 Hand Tap Set improves work organization and measurement standardization.
Compliance with DIN 2181/2, ISO 68-1 and ISO 965 ensures compatibility with measuring equipment, completing the operation with a repeatable profile along the entire thread length.
Stages of cutting an M38x2 thread with a 2-piece set: roughing tap and finishing tap
Frequently asked questions
The set consists of two taps — a roughing tap and a finishing tap, which guarantee a fully formed thread when used in sequence.
The HSS tool works well in low-carbon steel, aluminum, brass, and other materials with good machinability.
High-speed steel (HSS) provides high durability, abrasion resistance, and stable operation even under demanding conditions.
Product accessories
Metal drill bit 36 NWKc HSS DIN 345 Werko
Reference: 0416 In stock > 10 items
€52.11
€64.09 brutto
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Shipping
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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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