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VF-DIN371&376 HSSM2 Spiral Flute Form C Machine Tap with TiN Coating

Diameter Total length 63.0 mm Spiral length 13.0 mm

Machine tap made of high-performance high-speed steel with titanium nitride coating, with reinforced shank and right-hand spiral flutes 35° RSP for blind hole threads. Universal use for a wide range of materials thanks to hard coating. For through holes and blind holes in unalloyed and alloyed steels up to 900 N/mm² strength, VA metals. The thread is cut in a single operation. Note: Cutting speeds from 10 m/min. The TiN wear protection coating increases the surface hardness to approx. 2,500 HV. Titanium nitride is a chemical compound of the two elements titanium and nitrogen. TiN is a metallic hard material with a typical golden yellow colour. Advantages: Higher hardness, low coefficient of friction, longer service life. Cooling is not necessary, but is recommended.

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DIN371&376 HSSM2 Spiral Flute Form C Machine Tap with TiN Coating

Product Description

Size	P(mm)	L(mm)	Lc(mm)	Chamfer	d(mm)	K(mm)	n	Hole(mm)	Tap limits
DIN371
M3	0.5	56	11	2.5P	3.5	2.7	3	2.5	6H
M4	0.7	63	13	2.5P	4.5	3.4	3	3.3
M5	0.8	70	16	2.5P	6	4.3	3	4.2
M6	1	80	19	2.5P	6	4.9	3	5
M8	1.25	90	22	2.5P	8	6.2	3	6.75
M10	1.5	100	24	2.5P	10	8	3	8.5
DIN376
M12	1.75	110	29	2.5P	9	7	3	10.25	6H
M14	2	110	30	2.5P	11	9	4	12
M16	2	110	32	2.5P	12	9	4	14
M18	2.5	125	34	2.5P	14	11	4	15.5
M20	2.5	140	34	2.5P	16	12	4	17.5
M22	2.5	140	34	2.5P	18	14.5	4	19.5
M24	3	160	38	2.5P	18	14.5	4	21

DIN371 & DIN376 HSS‑M2 Spiral Flute Form‑C Machine Tap complies with European DIN371 solid shank and DIN376 reduced shank standards. The substrate adopts premium HSS‑M2 high‑speed steel. Form‑C spiral flute geometry creates upward chip flow to discharge chips backward out of the cavity, ideal for blind‑hole tapping.

The TiN titanium‑nitride coating delivers increased surface hardness, lowers friction coefficient and minimizes built‑up edge during machining. Precision‑ground thread teeth and optimized lead point ensure smooth cutting entry and clean thread profile. Suitable for CNC machine tapping in mass‑production workshops for carbon steel and low‑alloy steel workpieces.

Core Specifications

Industry Standard: DIN371 (Solid Shank) / DIN376 (Reduced Shank)
Base Material: HSS‑M2 High‑Speed Steel
Tool Type: Spiral Flute Form‑C Machine Cutting Tap
Surface Coating: TiN Coating (Titanium Nitride)
Flute Feature: Upward spiral flutes for backward chip evacuation
Primary Application: CNC blind‑hole tapping
Recommended Materials: Carbon Steel, Low‑Alloy Steel

Key Features

✅ Dual DIN Standard: DIN371 solid shank and DIN376 reduced shank for different tool holder requirements

✅ HSS‑M2 High‑Speed Steel Substrate: Good hardness and toughness for general‑purpose steel tapping

✅ TiN Golden Coating: Reduces friction, resists built‑up edge and prolongs tool service life

✅ Form‑C Spiral Flute Design: Backward chip removal, avoids chip clogging inside blind holes

✅ Precision‑Ground Thread Teeth: Achieves accurate thread dimension and smooth thread surface

✅ Optimized Lead Point: Smooth penetration into pre‑drilled holes, stable performance for batch CNC machining

Application Scenarios

Commonly used in CNC machining shops, machinery manufacturing and metal‑working industry. Mainly applied for blind‑hole internal thread tapping on carbon steel and low‑alloy steel parts.

Usage Notice

Select proper pre‑drill hole size according to thread specification. Use sufficient tapping coolant to reduce heat and friction. Adjust spindle speed based on workpiece material for best tapping result.

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