Meet the Wiseman Threading Tools Taper Lead Metric HSS Tap Left Hand - M30x3.5 — a precision threading tap built for dependable left-hand threads in metal. Crafted from high-speed steel and ground to tight tolerances, this tap is designed to handle demanding workshop tasks with consistent, clean results.

The taper lead geometry starts smoothly, guiding the tap into the hole with minimal resistance. This reduces startup chatter, simplifies alignment, and speeds up the tapping process, so you can move from pilot hole to full thread with confidence. The left-hand thread makes it ideal for applications that require reverse threading or securing components in reverse rotation without compromising fit or strength.

• Material and finish: High-speed steel (HSS) ground for sharp cutting edges and long tool life. Uncoated to maintain compatibility with a wide range of cutting fluids and workpiece materials.
• Thread details: Metric M30x3.5, left-hand thread, adhering to ISO 529 dimensional standards for reliable mating with nuts, fittings, and components designed for left-handed operation.
• Lead and geometry: Taper lead provides progressive cutting action, delivering smoother holes and reducing the risk of binding during entry and early thread creation.
• Applications: Ideal for general-purpose threading in steel, cast iron, and other common metals. Compatible with hand tapping setups and machine tapping heads that support standard taps.
• Durability and prep: Uncoated surface works well with standard cutting fluids; pair with proper lubrication to maximize tool life and minimize heat during tapping.

Designed for machinists, fabricators, and hobbyists who demand reliable, repeatable performance from a single, well-made tap. Whether you’re repairing a left-handed fastener path, threading a component for reverse-rotation assembly, or fabricating a custom part that requires precision left-hand engagement, this tap delivers accurate threads and robust performance in real-world use.

When accuracy and ease of use matter in left-hand threading projects, the Wiseman Threading Tools taper lead HSS tap for M30x3.5 stands ready to perform with consistency and control.