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Hand Tap M16x1.25 DIN 2181/2 6H HSSE Fra
12946
Thread size: M16x1,25172 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
€45.32 tax inc.
Net price: €36.84
Description
Technical data for the M16x1.25 cobalt hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M16 |
| Thread pitch P mm | 1.25 mm |
| Overall length l1 | 80 mm |
| Flute length l2 | 18 mm |
| Shank diameter d2 | 12 mm |
| Square drive size a | 9 mm |
| Tap drill diameter | 14.8 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 M16x1.25 thread is cut into the wall of a hole with a diameter of 14.8 mm. The thread groove extends 0.6 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 M16x1.25 hole – sequence 1, 2
Hand tapping step by step
Thread M16x1.25 in four steps
ØDrilling
Drill bit 14.8 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 16 mm minus pitch 1.25 mm gives 14.75 mm — in practice, use a 14.8 mm drill bit. 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 40 mm, or 2.5 times the thread diameter (2.5 x 16 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 M16x1.25 screw.
M16x1.25 hand taps for Inox stainless steel
Hand Tap M16x1.25 DIN 2181/2 6H HSSE is a precision tool designed to cut metric fine threads in harder steels, stainless alloys and nonferrous materials. Made of HSSE cobalt high-speed steel, it guarantees increased wear and heat resistance, making it an ideal solution for precision manufacturing and industrial applications.
Technical data: nominal diameter sixteen millimeters, pitch 1.25 millimeters, sixty° profile to ISO 68-1, internal thread tolerance 6H to ISO 965, right-hand thread. Straight flutes ensure smooth chip evacuation, while precision-ground HSSE reduces the risk of microcracking and increases cutting edge life. The two-piece design compliant with DIN 2181/2 — starter (I) and finishing (II) taps — balances torque and maintains axial alignment during operation. In workshop practice, exceptional machining stability and accuracy are enabled by M16x1.25 Hand Tap Set, facilitating proper tool guidance and adherence to the pass sequence.
- Machining precision — HSSE guarantees a clean thread profile even in difficult-to-machine materials.
- Durability and heat resistance — cobalt increases cutting edge hardness and minimizes wear under heavy loads.
- Class 6H fit — maintaining the optimum pitch diameter guarantees an accurate fit with the externally threaded component.
- Process control — even torque distribution and repeatable results are supported by M16x1.25 Hand Tap Set, ensuring high surface quality and safe operation.
Meeting DIN 2181/2 (construction), ISO 68-1 (60° metric profile) and ISO 965 (tolerance class 6H) requirements guarantees compatibility with inspection instruments and dimensional stability in every machining cycle. By combining precise geometry with high-strength HSSE, the tool maintains excellent performance in one-off and short-run machining.
Stages of cutting an M16x1.25 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.
The HSS tool works well in low-carbon steel, aluminum, brass, and other materials with good machinability.
Product accessories
Countersink M16X1.25 HSS DIN 22 568 Cztool
Reference: 0000006990 In stock > 10 items
€22.63
€27.84 brutto
14.8 mm HSS DIN 338 fluted metal drill bit
Reference: 14496 In stock > 10 items
€4.74
€5.83 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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