Wiseman Threading Tools Spiral Flute Metric HSS Tap – Right Hand is a precisely ground internal threading tap engineered for reliable, accurate M16x2 threads in metal. Crafted from high-speed steel and uncoated for general purpose use, this tap is built to deliver clean cuts, consistent dimensions, and dependable performance in a wide range of project materials. The spiral flute geometry actively sweeps away chips as you cut, making it easier to thread through holes and reducing the risk of clogging or breakage during tapping.

The tap conforms to ISO 529 dimensions, ensuring compatibility with standard hole sizes and thread profiles across tooling sets and maintenance shelves. This means you can trust repeatable results whether you’re fabricating a single part or outfitting a small production run. Spiral flute taps are particularly effective for through-holes and higher-chip-evacuation needs, offering smoother entry and improved cutting action compared with traditional straight-flute designs.

Key features at a glance

• Material & finish: High-speed steel (HSS) ground tap, uncoated for general purpose threading tasks. This combination supports robust cutting action and broad material compatibility.
• Geometry: Spiral flute design that aids chip evacuation and reduces binding in deep or through-hole applications. This geometry also contributes to better tolerance control and longer tool life when used with proper lubrication.
• Thread specification: Right-hand metric thread, specifically M16x2, ideal for standard installation and fastening needs in metal parts. ISO 529 compliant to maintain consistency with other taps in your toolkit.
• Application scope: General-purpose tapping across steel, aluminum, cast iron, and other machinable metals. The spiral flute design is especially beneficial for through-holes where efficient chip clearance matters.

Why this tap stands out

• Chip evacuation that works as you cut: The spiral flute channels chips up and out of the hole, reducing pressure at the cutting edge and helping you achieve a cleaner thread with less effort. This is especially valuable in deeper holes or when working with tougher materials.
• ISO 529 alignment: Rigorously designed to ISO 529 standards, so you can expect reliable thread form and interchangeability with other ISO 529 taps in your collection. This matters for maintenance, repairs, and multi-part assemblies.
• Versatile, uncoated HSS tap: The uncoated HSS construction handles a broad range of metals in everyday workshops and production settings, offering toughness and heat resistance without a coatings layer that can interfere with certain lubricants.
• Designed for right-handed tapping: Standard orientation for most DIY and professional applications, ensuring intuitive use with common drilling and tapping machines or hand tapping setups.

Ideal use scenarios

• Fabrication and repair work that requires a precise M16x2 internal thread in steel, aluminum, or other machinable metals.
• Repairing threaded inserts or reworking worn holes in machinery housings, brackets, fixtures, and automotive components where a robust, general-purpose tap is appropriate.
• Workshop projects and small production tasks where chip control and reliable thread quality are priorities, thanks to the spiral flute’s improved chip flow and cutting action.

Practical tips for best results

• Pair with appropriate cutting oil or tapping fluid to maximize tool life and produce smoother, more accurate threads. The uncoated HSS tap relies on lubrication to manage friction during cutting.
• Use steady, straight-line feeding and avoid side loading. Let the flute geometry do the work as the tap advances, and back off intermittently to break and evacuate chips in deeper holes.
• Match tapping speed and depth to the material and hole size, following standard machining practices for ISO 529 taps. This helps prevent over-tapping or premature wear in the cutting edges.

Whether you’re a professional machinist, a maker, or maintaining a busy workshop, this Wiseman spiral flute HSS tap for M16x2 delivers dependable thread quality, predictable results, and the durability you need for regular threading tasks. The image highlights the tool’s robust spiral geometry and the unmistakable square shank designed for secure, precise engagement in standard tapping chucks and handles.