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Hand Tap M12X1 DIN 2181/2 6H HSS
0000006821
Thread size: M12x1172 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
€15.21 tax inc.
Net price: €12.37
Description
Technical data for the M12x1 hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M12 |
| Thread pitch P mm | 1 mm |
| Overall length l1 | 70 mm |
| Flute length l2 | 22 mm |
| Shank diameter d2 | 9 mm |
| Square drive size a | 7 mm |
| Tap drill diameter | 11 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 M12x1 thread is cut into the wall of a hole with a diameter of 11 mm. The thread groove extends 0.5 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 M12x1 hole – sequence 1, 2
Hand tapping step by step
Thread M12x1 in four steps
ØDrilling
Drill bit 11 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 12 mm minus pitch 1 mm gives 11 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 30 mm, or 2.5 times the thread diameter (2.5 x 12 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 M12x1 screw.
M12x1 fine-thread hand taps
Hand Tap M12x1 DIN 2181/2 6H HSS is designed to produce metric fine threads in structural steels, stainless steels, copper, and aluminum alloys. Precision manufacturing and refined profile geometry enable clean, uniform threads of accuracy class 6H, which is essential in precision machining and technical assemblies.
Technical data: nominal diameter twelve millimeters, pitch one millimeter, sixty° profile according to ISO 68-1, internal thread tolerance class 6H according to ISO 965, right-hand. Straight flutes ensure consistent chip evacuation, while ground high-speed steel (HSS) guarantees long cutting edge life and resistance to microcracking. The two-tap configuration according to DIN 2181/2 — starting tap (I) and finishing tap (II) — balances torsional loads and stabilizes thread alignment. In workshop practice, high accuracy and dimensional repeatability are supported by M12x1 Hand Tap Set, which improves work organization and ensures a controlled machining sequence.
- Stable profile formation — the two-tap configuration eliminates torque fluctuations and improves axial guidance.
- Cutting edge life — ground high-speed steel ensures long service life and a clean machined surface.
- Class 6H fit — pitch diameter control guarantees a proper fit with the threaded pin.
- Repeatable results — during long operating cycles, machining accuracy and consistency are facilitated by M12x1 Hand Tap Set.
Compliance with DIN 2181/2, ISO 68-1, and ISO 965 ensures full compatibility with measuring instruments and repeatable profile geometry in every operating cycle. The design and manufacturing specifications guarantee predictable results and smooth operation, making the tool well suited to precision workshops and short-run production.
Stages of cutting an M12x1 thread with a 2-piece set: roughing tap and finishing tap
Frequently asked questions
The set contains two taps – the first is a roughing tap for initial guidance and the second is a finishing tap for producing the final thread form.
Yes, M12x1 hand taps are suitable for both through holes and blind holes.
M12x1 HSS taps are designed for low-carbon steel, aluminum, brass, and other easily machined metals.
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Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| 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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