RUKO 5/16-18 UNC HSSCO Machine Tap

RUKO 5/16-18 UNC HSS-Co Machine Tap

Description

This is a high-performance machine tap from RUKO, designed for precision threading in industrial applications. Manufactured from High-Speed Steel with a 5% Cobalt alloy (HSS-Co), this tap provides exceptional durability, heat resistance, and wear resistance. It is specifically engineered for cutting 5/16-18 UNC (Unified National Coarse) threads. The spiral flute design makes it ideal for tapping blind holes by efficiently evacuating chips from the cutting area.

Specifications

• Manufacturer: RUKO
• Part Number: 236105
• Thread Size: 5/16 inch
• Threads Per Inch (TPI): 18
• Thread Standard: UNC
• Material: HSS-Co (5% Cobalt)
• Flute Type: Spiral Flute
• Overall Length: 100 mm
• Shank Diameter: 8.0 mm
• Square Drive Size: 6.2 mm

Label Info

• RUKO 5/16-18 UNC HSSCo

Application

This machine tap is perfectly suited for creating internal threads in a variety of demanding materials, including stainless steel (INOX), alloyed steels, cast iron, and other hard-to-machine metals. Its robust construction ensures reliable performance in CNC machines and other automated tapping equipment.

Country of Origin

Germany

CO2 Impact

By purchasing this reused tool, you are contributing to a circular economy and avoiding the emission of approximately 0.06 kg of CO2 associated with the production of a new one. This saving is equivalent to the energy needed to fully charge a standard smartphone more than 7 times.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the advantage of HSS-Co material for this tap?

HSS-Co, or High-Speed Steel with Cobalt, provides significantly higher heat resistance and hardness compared to standard HSS. This allows the tap to maintain a sharp cutting edge at higher speeds and in tougher materials like stainless steel, resulting in a longer tool life and better thread quality.

Is this tap suitable for through holes as well as blind holes?

While its spiral flute design is optimized for evacuating chips from blind holes, it can also be used effectively for through holes. The primary benefit is in blind hole applications where chip removal is critical to prevent tap breakage.

What does the green ring on the shank indicate?

For RUKO taps, the green ring is a color code that signifies the tool is specifically designed and optimized for machining stainless steel (INOX) and other difficult materials. It indicates a specific geometry and material composition for high performance in these applications.

Last Update: Friday, March 13, 2026

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