M3–M12 Metric HSS Tap And Twist Drill Set With Adjustable Tap Wrench, DIN 352/DIN 338 - Ruko GmbH

Take advantage of the HSS construction, conformity to DIN standards and the complete component set for efficient, one-pass thread production; order the set directly via Metav Werkzeuge or consult Metav's advisors for application-specific guidance.

Thread tap set "Form B" – HSS metric ISO tapping kit by RUKO (M3–M12, incl. twist drills)

Thread tap set "Form B" – RUKO is a compact tapping kit designed for machining metric ISO through threads in unalloyed and low-alloy steels; suitable for both hand and machine use.

• HSS taps for unalloyed and low-alloy steels
• Includes core twist drills DIN 338 Type N
• One-pass cutting for hand and machine use
• Adjustable DIN 1814 tap wrench included

Consistent, standard-compliant thread results for production

The kit is engineered to meet DIN 352 requirements and to produce metric ISO threads reliably in through-hole applications. The use of high-speed steel (HSS) taps ensures consistent performance under typical workshop conditions, while the specification for machining steels up to 800 N/mm² gives a clear performance envelope. Because the taps are suitable for one-pass cutting in both manual and machine operations, cycle times can be reduced and process steps simplified, making the set a pragmatic choice for maintenance bays and small-series production alike.

Ready-to-use set speeds up setup and reduces downtime

This threading kit contains one-cut taps for sizes M3, M4, M5, M6, M8, M10 and M12, matched with corresponding core twist drills (DIN 338 Type N Ø 2.5 / 3.3 / 4.2 / 5.0 / 6.8 / 8.5 / 10.2 mm) and an adjustable tap wrench (DIN 1814, Gr. 1 1/2). Having appropriately sized drills paired with each tap removes guesswork at the bench and reduces the risk of incorrect pre-drilling. The balanced composition of the kit supports faster changeovers and fewer interruptions to the machining process, which contributes to steady throughput and predictable output quality.

Practical handling and tool-life considerations

The HSS construction offers a robust compromise between toughness and wear resistance for general-purpose tapping in unalloyed and low-alloy steels. The tap geometry stated as Form B with the specified cutting relief provides reliable chip formation for through threads, while the included twist drills (HSS-G) prepare the correct core diameter for optimal tap engagement. Proper lubrication and machine speeds aligned with material hardness will extend tool life; the clear numeric limits given (up to 800 N/mm²) allow straightforward process planning without extensive testing.

Suitable for workshop and light industrial environments

Packed as a single unit and intended for both manual and machine tapping, the kit is a practical addition to workshop inventories. The combination of standardised parts and the adjustable tap wrench supports flexible application scenarios, from repair work to small-batch production. Metav's positioning as a precision partner means availability and reliable fulfilment from Emmerich — a decisive advantage when integrating the kit into a broader tooling strategy where predictable supply and expert advice matter.

Secure technical advice and local availability from Metav Werkzeuge — contact Metav Werkzeuge at info@metav-werkzeuge.com or call +49 2822 7131930 to discuss suitability for specific materials and applications

Technical data

• Article number: 8000421314NW
• Packaging unit: 1
• UID: 8000421314NW

Facts

• Tap sizes: M3, M4, M5, M6, M8, M10, M12
• Drill diameters (mm): 2.5 / 3.3 / 4.2 / 5.0 / 6.8 / 8.5 / 10.2
• Material strength suitability: up to 800 N/mm²
• Standards: DIN 352, DIN 338, DIN 1814

Special features

• High-speed steel (HSS) taps
• Metric ISO threads for through holes
• One-pass cutting usable by hand and machine
• Core twist drills DIN 338 Type N HSS-G included
• Adjustable tap wrench DIN 1814 Gr. 1 1/2 included
• Intended for unalloyed and low-alloy steels

FAQ

What materials can be machined with this tapping kit?
The tapping kit is designed for unalloyed and low-alloy steels and rated for use up to 800 N/mm²; the HSS taps and matching twist drills support those material classes.

Are the correct twist drill diameters included for each tap size?
Yes, the set contains core twist drills (DIN 338 Type N) sized to match the taps: Ø 2.5 / 3.3 / 4.2 / 5.0 / 6.8 / 8.5 / 10.2 mm for the respective tap sizes M3–M12.

Can the taps be used in a machine as well as by hand?
The taps are specified for one-pass cutting in both manual and machine operation, enabling flexible use in workshops and light production environments.

What standard and form do the taps comply with?
The taps conform to DIN 352 and produce metric ISO threads; the set follows the Form B geometry for the stated applications.

Does the set include a tap wrench, and which standard does it follow?
An adjustable tap wrench (DIN 1814, Gr. 1 1/2) is included, facilitating manual tapping and secure clamping of the taps.

Ruko GmbH: Manufacturer/Responsible: Ruko GmbH Präzisionswerkzeuge, Robert-Bosch-Strasse 7, 71088 Holzgerlingen