Wiseman Threading Tools Spiral Point Metric HSS Tap Left Hand - M16x2 is a precision metalworking tap designed to deliver clean, accurate left-handed threads in through-holes. Crafted from high-speed steel and ground for exactness, this tool is built to perform in demanding workshops and professional shops alike.

Key advantages that set this tap apart

• Left-hand threading capability to create reverse-rotation threads where the fastener tightens as it’s driven, ideal for select mechanical assemblies and components that require a reverse-threaded connection.
• Spiral point (gun nose) geometry amplifies tapping efficiency by driving chips forward and guiding the tap with confidence, making through-holes faster to complete and reducing chatter.
• High-speed steel (HSS) ground finish, uncoated for robust performance across common metals such as steel, aluminum, brass, and cast iron. The uncoated surface accepts standard cutting fluids to optimize heat dispersal and extend tap life.
• ISO 529 compliant and sized specifically for M16x2 threads, ensuring predictable results and compatibility with standard fasteners and nuts.
• General-purpose utility in a single, reliable tool that elevates everyday threading tasks—from repair work to new-build projects.

Practical applications and use cases

• Perfect for through-holes in metalworking projects where a left-handed connection is required, such as certain pulleys, clamps, or drive components in power transmission systems.
• Well suited for maintenance and repair in automotive, equipment, and machinery contexts where reverse-thread fasteners are specified.
• Ideal for shop setups that standardize on metric threads, offering a precise M16x2 specification for consistent, repeatable results.

How to get the best results

Before tapping, ensure the workpiece is properly prepared with a clean, burr-free hole. Use an appropriate cutting fluid to cool and lubricate the cutting action and reduce wear. Begin with light, manual engagement to establish alignment, then switch to a tapping wrench or machine setup designed for left-hand threads. For through-holes, the spiral-point design helps evacuate chips as you progress, minimizing clogging. After tapping, withdraw the tap smoothly and wipe away any residue. Store the tool in a dry environment to protect the uncoated steel surface.

Why choose this Wiseman tap over alternatives

This spiral-point, left-hand HSS tap is purpose-built for left-handed thread production in through-holes, offering faster progression and cleaner finishes thanks to its gun-nose geometry. Its ISO 529 alignment and robust HSS construction provide dependable, repeatable performance across typical metalworking materials, making it an essential addition to any machinist’s toolkit.