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  • Gwintownik skrętny HSSE DIN 371 /376/374 R45° TiN/TiCN/AlTiN2
  • Gwintownik skrętny HSSE DIN 371 /376/374 R45° TiN/TiCN/AlTiN
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Spiral Flute Machine Tap HSSE DIN 371/376 - TiCN

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Select DIN371 HSSE M2x0,4 TiCN DIN371 HSSE M2,5x0,45 TiCN DIN371 HSSE M3x0,5 TiCN DIN371 HSSE M4x0,7 TiCN DIN376 HSSE M4x0,7 TiCN DIN371 HSSE M5x0,8 TiCN DIN376 HSSE M5x0,8 TiCN DIN371 HSSE M6x1 TiCN DIN376 HSSE M6x1 TiCN DIN374 HSSE MF6*0,75 TiCN DIN374 HSSE MF6*0,5 TiCN DIN371 HSSE M8x1,25 TiCN DIN376 HSSE M8x1,25 TiCN DIN371 HSSE MF8*1 TiCN DIN374 HSSE MF8*0,75 TiCN DIN371 HSSE M10x1,5 TiCN DIN376 HSSE M10x1,5 TiCN DIN371 HSSE MF10*1,25x1,25 TiCN DIN371 HSSE MF10*1x1 TiCN DIN376 HSSE M12x1,75 TiCN DIN374 HSSE MF12*1,5 TiCN DIN374 HSSE MF12*1,25 TiCN DIN374 HSSE MF12*1 TiCN DIN376 HSSE M14x2 TiCN DIN374 HSSE MF14*1,5 TiCN DIN376 HSSE M16x2 TiCN DIN374 HSSE MF16*1,5 TiCN DIN376 HSSE M18x2,5 TiCN DIN374 HSSE MF18*1,5 TiCN DIN376 HSSE M20x2,5 TiCN DIN374 HSSE MF20*1,5 TiCN DIN376 HSSE M22x2,5 TiCN DIN374 HSSE MF22*1,5 TiCN DIN376 HSSE M24x3 TiCN DIN374 HSSE MF24*1,5 TiCN DIN376 HSSE M27x3 TiCN DIN376 HSSE M30x3,5 TiCN DIN376 HSSE M33x3,5 TiCN DIN376 HSSE M36x4 TiCN
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Product description

DIN 371 tap – rendering and geometryDIN 374 tap – rendering and geometryDIN 376 tap – rendering and geometry

Spiral-flute machine tap made to DIN 371 / 374 / 376 (DIN 371 for M threads ≤ 10 mm, DIN 376 for M ≥ 12 mm, DIN 374 for fine threads). Intended for cutting internal metric M and metric fine MF. Spiral flutes with a helix angle of 45° (R45) carry chips back towards the shank and out of the hole, for use in blind holes. Made from HSSE (HSS-E, cobalt-alloyed high-speed steel) with a TiCN coating.

Applications

  • Cutting metric M threads in blind holes
  • Tapping materials that produce long chips, including ductile steel, stainless steel and aluminium
  • Machining components where chips must be removed towards the hole opening
  • Threads close to the bottom of a hole

The spiral flutes carry chips towards the hole opening. The tap is intended for blind holes and materials that produce long, continuous chips.

Specification

ParameterValue
Thread typeM (metric) and MF (metric fine)
StandardDIN 371 / 374 / 376
Flute geometrySpiral flute, helix angle 45° (R45)
Cutting directionRight-hand (RH)
Thread tolerance class6H
MaterialHSSE (HSS-E, cobalt-alloyed high-speed steel)
CoatingTiCN (titanium carbonitride, grey-blue colour)
Size selectionSelect the exact size from the product options. The table below gives reference dimensions for standard and metric fine MF threads.

Reference sizes and dimensions

SizeStandardPitch P (mm)ClassOverall length L (mm)Thread length l (mm)Neck l₁ (mm)Lead lᴄShank d₁ (mm)Square a (mm)FlutesTap drill diameter (mm)
M2×0,4DIN 3710,46H456132,5×P2,82,131,6
M2,5×0,45DIN 3710,456H506152,5×P2,82,132,1
M3×0,5DIN 3710,56H566182,5×P3,52,732,5
M4×0,7DIN 3710,76H639212,5×P4,53,433,3
M5×0,8DIN 3710,86H7010252,5×P64,934,2
M6×1DIN 37116H8012302,5×P64,935
M8×1,25DIN 3711,256H9015352,5×P86,236,8
MF8×1DIN 37116H9015352,5×P86,237
M10×1,5DIN 3711,56H10018392,5×P10838,5
MF10×1DIN 37116H9015352,5×P10839
MF10×1,25DIN 3711,256H10018392,5×P10838,8
M4×0,7DIN 3760,76H639—2,5×P2,82,133,3
M5×0,8DIN 3760,86H7010—2,5×P3,52,734,2
M6×1DIN 37616H8012—2,5×P4,53,435
M8×1,25DIN 3761,256H9015—2,5×P64,936,8
M10×1,5DIN 3761,56H10018—2,5×P75,538,5
M12×1,75DIN 3761,756H11021—2,5×P97310,3
M14×2DIN 37626H11020—2,5×P119312
M16×2DIN 37626H11020—2,5×P129314
M18×2,5DIN 3762,56H12525—2,5×P1411315,5
M20×2,5DIN 3762,56H14025—2,5×P1612417,5
M22×2,5DIN 3762,56H14025—2,5×P1814,5419,5
M24×3DIN 37636H16030—2,5×P1814,5421
M27×3DIN 37636H16045—2,5×P2016424
M30×3,5DIN 3763,56H18035—2,5×P2218426,5
M33×3,5DIN 3763,56H18035—2,5×P2520429,5
M36×4DIN 37646H20040—2,5×P2822432
MF6×0,5DIN 3740,56H8014—2,5×P4,53,435,5
MF6×0,75DIN 3740,756H8014—2,5×P4,53,435,3
MF8×0,75DIN 3740,756H8018—2,5×P64,937,3
MF12×1DIN 37416H10015—2,5×P97311
MF12×1,25DIN 3741,256H10021—2,5×P97310,8
MF12×1,5DIN 3741,56H10021—2,5×P97310,5
MF14×1,5DIN 3741,56H10020—2,5×P119312,5
MF16×1,5DIN 3741,56H10020—2,5×P129314,5
MF18×1,5DIN 3741,56H11025—2,5×P1411316,5
MF20×1,5DIN 3741,56H12525—2,5×P1612418,5
MF22×1,5DIN 3741,56H12525—2,5×P1814,5420,5
MF24×1,5DIN 3741,56H14028—2,5×P1814,5422,5

Dimensions (mm). DIN 371 = reinforced shank (M≤10), DIN 376 = reduced shank (M≥12, coarse pitch), DIN 374 = reduced shank for metric fine threads (MF). The neck length l₁ is not standardised for reduced shanks (—). Lead lᴄ (cutting taper) = 2,5×P (spiral flute R45°). Tap drill diameter = recommended drill diameter before tapping.

Selecting a coating for the workpiece material

CoatingApplication
TiN (gold)General-purpose coating; structural, carbon and alloy steels up to approximately 900 MPa, cast iron and non-ferrous metals.
TiCN (grey-blue)Harder and more abrasion-resistant than TiN; higher-strength steel, stainless steel, hardened steel up to approximately 45 HRC and ductile materials.
TiAlN (anthracite)Dry machining or MQL; hard and difficult-to-machine materials, stainless steel, titanium, Inconel and cast iron.

This product has a TiCN coating: harder and more abrasion-resistant than TiN; for higher-strength steel, stainless steel, hardened steel up to approximately 45 HRC and ductile materials.

What is the lead?

The lead is the tapered cutting section at the front of the tap. The initial thread cutting is distributed over its first few threads. A longer lead makes entry into the material easier, but the full thread ends farther from the bottom of a blind hole. Type C/E lead (cutting taper), approximately 2-3,5 threads, for tapping close to the bottom of a hole. A shorter lead allows the thread to be cut close to the bottom of a blind hole.

FAQ

Through holes or blind holes?
A spiral-flute tap carries chips towards the hole opening and is intended for blind holes.

Which coating should I choose?
TiN for general applications, TiCN for higher-strength and stainless steels, TiAlN for hard materials and dry machining.

How does HSSE differ from ordinary HSS?
HSSE (HSS-E) contains cobalt to increase hot hardness and cutting-edge durability compared with ordinary HSS.

Coolant?
Emulsion or tapping oil is recommended.

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