Premium M3-M52 DIN 374 Machine Taps | HSSE Cobalt 5% Spiral Point | High-Speed Threading for Fine Pitch Alloys
1. Introduction: The Metric Fine (MF) Specialist
Our DIN 374 Spiral Point Machine Taps are engineered specifically for Metric Fine (MF) threading in through-hole applications. Unlike standard coarse threads, fine pitch threads require higher precision and lower torque.
The Spiral Point (Gun Point) design features a shallow straight flute with a specialized cutting face that pushes chips forward and out the bottom of the hole. Available in HSS-M2 for general engineering and HSS-E M35 (5% Cobalt) for high-tensile alloys, these taps deliver the 6H tolerance accuracy required for critical mechanical assemblies.
2. Technical Specifications (MF M3 - M52 Range)
| Size (MF) | Pitch (P) | Standard | Overall Length (L1) | Thread Length (L2) | Shank Ø (D2) | Square (K) |
| M3 - M5 | 0.35 - 0.50 | DIN 374 | 56 - 70 mm | 8 - 12 mm | 2.2 - 3.5 mm | 1.8 - 2.7 mm |
| M6 - M8 | 0.50 - 1.00 | DIN 374 | 80 - 90 mm | 10 - 22 mm | 4.5 - 6.0 mm | 3.4 - 4.9 mm |
| M10 - M12 | 1.00 - 1.50 | DIN 374 | 90 - 100 mm | 20 - 22 mm | 7.0 - 9.0 mm | 5.5 - 7.0 mm |
| M14 - M18 | 1.00 - 1.50 | DIN 374 | 100 - 110 mm | 22 - 25 mm | 11.0 - 14.0 mm | 9.0 - 11.0 mm |
| M20 - M24 | 1.50 - 2.00 | DIN 374 | 125 - 140 mm | 25 - 28 mm | 16.0 - 18.0 mm | 12.0 - 14.5 mm |
| M27 - M33 | 1.50 - 2.00 | DIN 374 | 140 - 160 mm | 28 - 30 mm | 20.0 - 25.0 mm | 16.0 - 20.0 mm |
| M36 - M42 | 1.50 - 3.00 | DIN 374 | 170 - 190 mm | 30 - 40 mm | 28.0 - 32.0 mm | 22.0 - 24.0 mm |
| M45 - M52 | 1.50 - 4.00 | DIN 374 | 200 - 225 mm | 40 - 50 mm | 36.0 - 40.0 mm | 29.0 - 32.0 mm |
3. Material & Manufacturing Excellence
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Bright Finish (Uncoated): The precision-ground bright finish offers a sharp cutting edge and excellent surface integrity. It is the ideal choice for non-ferrous metals and general-purpose steel where specific coatings are not required.
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HSS-M2 vs. HSS-M35: * M2 Grade: Perfect for mild steels, aluminum, and brass (up to 800 N/mm²).
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M35 (5% Cobalt): Engineered for Stainless Steel (304/316) and high-alloy steels where heat resistance is vital (up to 1200 N/mm²).
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Fully Ground Geometry: CNC-ground from solid hardened blanks ensures perfectly concentric threads and a 6H Tolerance Class.
4. Strategic Industrial Applications
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Automotive & Aerospace: Used for fine-pitch fasteners in engine blocks and hydraulic manifolds.
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Hydraulic & Pneumatic Fittings: Ensures leak-proof thread engagement in thin-wall connectors.
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Electronics & Instruments: Perfect for M3-M6 fine threads used in precision measurement tools.
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Through-Hole Efficiency: Designed for high-speed automated production where forward chip evacuation is mandatory.
5. Packaging & Logistics
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Secure Individual Storage: Each tap is vacuum-sealed and housed in a shockproof Rose-Box plastic case to protect the fine thread geometry.
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Anti-Rust Protection: Every tool is coated in industrial-grade oil, guaranteeing a 36-month safe shelf life for wholesalers.
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OEM Customization: Since 1997, we have provided Laser Marking (Logo + MF Size + Material + DIN 374) for global tool distributors.
6. Professional FAQ
Q: Why use DIN 374 instead of DIN 371/376?
A: DIN 374 is the specific standard for Metric Fine (MF) threads with a reduced shank. While DIN 371/376 is for standard coarse threads, DIN 374 ensures the correct dimensions for the finer pitches used in specialized engineering.
Q: Can I use a Spiral Point tap for Blind Holes?
A: No. Spiral point taps push chips forward. In a blind hole, the chips will clog at the bottom and snap the tap. For blind holes, use our Spiral Flute series.
Q: What drill size should I use for MF threads?
A: Because fine threads have a smaller height, the tapping drill size is different from standard threads. For example, for M10 x 1.0, the drill size is 9.0 mm (Nominal Size - Pitch).
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