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Hand Tap M4.5x0.5 DIN 2181/2 6H HSS
5586
Thread size: M4,5x0,5172 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
€9.71 tax inc.
Net price: €7.89
Description
Technical data for the M4.5x0.5 hand tap
| Technical data | |
|---|---|
| Nominal diameter d1 mm | M4.5 |
| Thread pitch P mm | 0.5 mm |
| Overall length l1 | 53 mm |
| Flute length l2 | 13 mm |
| Shank diameter d2 | 4.5 mm |
| Square drive size a | 3.55 mm |
| Tap drill diameter | 4 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 M4.5x0.5 thread is cut into the wall of a hole with a diameter of 4 mm. The thread groove extends 0.25 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 M4.5x0.5 hole – sequence 1, 2
Hand tapping step by step
Thread M4.5x0.5 in four steps
ØDrilling
Drill bit 4 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 4.5 mm minus pitch 0.5 mm gives 4 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 11.25 mm, or 2.5 times the thread diameter (2.5 x 4.5 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 M4.5x0.5 screw.
M4.5x0.5 fine-thread hand taps
Hand Tap M4.5x0.5 DIN 2181/2 6H HSS is designed to produce metric fine thread M4.5 with a pitch of zero point five millimeters in structural steels with a strength of up to eight hundred megapascals. In assembly work, an orderly sequence of operations and easy identification of the taps are ensured by M4.5x0.5 Hand Tap Set, used in two passes.
Technical specifications: nominal diameter four and a half millimeters; pitch zero point five millimeters; sixty° profile per ISO 68-1; internal thread tolerance class 6H in accordance with ISO 965; right-hand design; straight flutes for predictable chip evacuation. The two-piece arrangement per DIN 2181/2 — a starter tap (I) and a finishing tap (II) — balances torsional loads and helps maintain axial alignment in narrow holes. Precision-ground high-speed steel (HSS) construction stabilizes the cutting edge and reduces microchipping. Recommended tap drill: four millimeters; lubrication with emulsion or active cutting oil improves surface quality and cutting edge life.
- Uniform profile shaping — two stages (starting and finishing) smooth out torque variations, reducing the risk of seizure.
- Longer cutting edge life — precision grinding of high-speed steel (HSS) reduces abrasion and material adhesion, extending the intervals between resharpening.
- Class 6H fit — maintaining the effective diameter within the tolerance zone promotes successful GO / NO-GO verification.
- Orderly workflow — M4.5x0.5 Hand Tap Set makes tap selection straightforward and speeds up changes between passes.
Compliance with DIN 2181/2 (construction), ISO 68-1 (sixty° profile), and ISO 965 (6H tolerances) ensures compatibility with inspection and measuring equipment and repeatable thread geometry in one-off and small-batch machining.
Stages of cutting an M4.5x0.5 thread with a 2-piece set: roughing tap and finishing tap
Frequently asked questions
Drill to 4 mm (diameter 4.5 mm minus pitch 0.5 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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