Introducing the Wiseman Threading Tools Second Lead Metric HSS Tap Right Hand - M28x1.5, a precision-ground high-speed steel tap built for dependable metric threading in a range of metals. This uncoated, general-purpose tap follows ISO 529 dimensions and features a right-hand thread with a second lead (USA plug lead) for faster, smoother thread formation.

What makes this tap stand out

• Precision-ground HSS delivers clean, accurate threads with consistent performance across jobs.
• Uncoated finish provides flexible compatibility with standard cutting fluids and various workpiece materials without interference from coatings.
• Second lead (two-start) design reduces tapping torque and accelerates thread formation, making through-holes easier to machine and less tiring on the operator.
• Right-hand thread aligned with common fastener installations, ensuring reliable engagement and easy screw-in operation.
• ISO 529 compliance guarantees standardized dimensions for predictable results and interchangeability with other metric taps.
• USA plug lead caters to typical tooling setups in North American shops.

Key specifications

• Brand: Wiseman Threading Tools
• Tool type: Tap (threading tap)
• Material: High-Speed Steel (HSS)
• Finish: Uncoated
• Thread: Right Hand
• Lead: Second Lead
• Size: M28x1.5
• Standard: ISO 529
• Lead type: USA Plug Lead

Ideal use cases

• Through-holes in steel, cast iron, or alloy components where metric threads are required
• Repair or reproduction work in machine shops, fabrication, and DIY metalworking projects
• Projects that benefit from quick, smooth threading thanks to the second-lead design

Practical tips for best results

• Use an appropriate cutting fluid to maximize chip evacuation and tool life with uncoated HSS taps.
• Ensure workpiece alignment and steady, perpendicular feed to maintain thread accuracy.
• Limit overheating by maintaining a light, controlled cutting action—let the tool do the work.
• Match the drill size and tapping speed to the M28x1.5 specification for optimal thread depth and strength.