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Hand Tap M19X1.5 DIN 2181/2 6H HSS
Net price: €34.21
Description
Technical data for the M19x1.5 hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M19 |
| Thread pitch P mm | 1.5 mm |
| Overall length l1 | 80 mm |
| Flute length l2 | 22 mm |
| Shank diameter d2 | 14 mm |
| Square drive size a | 11 mm |
| Tap drill diameter | 17.5 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 M19x1.5 thread is cut into the wall of a hole with a diameter of 17.5 mm. The thread groove extends 0.75 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 M19x1.5 hole – sequence 1, 2
Hand tapping step by step
Thread M19x1.5 in four steps
Drill bit 17.5 mm
Chamfer 8 threads
Chamfer 2 threads
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 19 mm minus pitch 1.5 mm gives 17.5 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 47.5 mm, or 2.5 times the thread diameter (2.5 x 19 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 M19x1.5 screw.
M19x1.5 fine-thread hand taps
M19X1.5 Hand Tap DIN 2181/2 6H HSS is designed for hand cutting of metric fine threads in steels and cast iron; in workshop applications, the M19x1.5 hand tap maintains a 60° profile and a repeatable class 6H internal thread fit.
Configuration and working dimensions: M19 with pitch P=1.5; right-hand; high-speed steel (HSS), ground finish; straight flutes for controlled chip breaking and evacuation; straight shank with a square drive for use with a tap wrench; recommended drill diameter 17.5 mm, promoting proper thread engagement and axial alignment.
- Precise fit. The class 6H hole is compatible with 6g external threads, ensuring nominal clearance and dimensional conformity.
- Stable entry. The progressive chamfer balances loads and reduces the risk of oversizing the entry zone.
- Surface quality. The ground edge and straight flutes promote low thread surface roughness and fewer corrections.
- Smooth passes. Application M19x1.5 hand tap set facilitates the transition from roughing to finishing without losing axial alignment.
Standards and tolerances: manufactured to DIN 2181/2; metric profile according to ISO 68-1; series and pitches according to ISO 261/262; tolerances according to ISO 965 (6H hole). Hand Tap Set M19X1.5 DIN 2181/2 6H HSS ensures controlled thread geometry in one-off and assembly operations.
Stages of cutting an M19x1.5 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.
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.
Product accessories
HSSE 17.5 cobalt metal drill bit DIN 338
Reference: 13297 In stock > 10 items
€21.04 brutto
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