Ruko A245055 Machine Tap Set, HSS, M4–M10, Reinforced Shank

Made from high-speed steel alloy, the Ruko A245055 is a machine tap set for metric threads. It covers sizes M4, M5, M6, M8 and M10. Reinforced shanks support use as machine taps, while the thread is cut in one operation. The taps come in a plastic case for keeping the set together between jobs.

Practical tips

Match the tap size to the metric thread required and use the set for through or blind holes from M4 to M10. This is useful when a repair or fabrication task calls for several thread sizes: rather than selecting a single tap for one repeated job, you have a range of commonly used metric sizes together. For a job involving just one size, a single matching tap may be all that is needed, for varied work, the broader range makes it easier to move between sizes without changing tool families.

As machine taps, these tools are intended for cutting threads in a tapping operation. The reinforced shank is a practical feature for this type of use, and cutting the thread in one operation helps keep the process straightforward. A typical application is preparing different threaded holes during metalworking or equipment maintenance, where the required thread size can vary from one component to another.

Where it shines

The range is suited to common industrial materials, including unalloyed and low-alloyed steels with strength up to 800 N/mm², malleable iron and non-ferrous metals. That makes the set relevant to workshop tasks such as threading holes in metal components for assembly, repair or fabrication. The stated surface recommendations also include metal and plastic.

The taps follow the metric thread standard DIN ISO 13, giving the set a clear role in work that calls for those threads. Its combination of several sizes and machine-tap construction is particularly useful when a bench job involves more than one component or thread dimension. Rather than choosing separate tools one at a time, you can select the matching tap from the set as the work progresses.

Technical details

• Type: Machine tap set
• Material: High-speed steel alloy tool steel
• Thread sizes: M4, M5, M6, M8 and M10
• Thread standard: Metric DIN ISO 13
• Hole type: Through or blind holes
• Shank: Reinforced, straight
• Cutting: Right-hand, thread cut in one operation
• Tap forms: Form B with spiral point, Form C
• Tolerance: ISO 2/6H
• Flanks: Relief-ground
• Finish: Shiny
• Case: Plastic

Is it worth it?

For workshop users who need to cut metric threads across several sizes, the Ruko A245055 brings M4 to M10 taps together in one set, with high-speed steel alloy construction and reinforced shanks. Its stated use across common industrial metals makes it a practical match for varied fabrication and maintenance work, especially when the thread size changes from hole to hole. Choose it when a spread of metric machine taps is more useful than keeping only one size on hand.