Meet the Wiseman Threading Tools Metric Fine HSS Hand Tap Set ISO 529 - M28x1.5. This precise, hand-tap kit is built for reliable metric threading in metalworking projects, delivering clean threads with repeatable accuracy. The right-hand thread and ISO 529 dimensions ensure compatibility with standard metric fasteners and equipment, making it a dependable choice for both shop work and DIY projects.

Key features that matter in real-world threading

• Material and finish: High-speed steel (HSS) ground taps for strong cutting edges and durable performance. The set is uncoated, offering broad compatibility across a range of materials and easier chip clearing in everyday use.
• Metric fine thread: Taps are sized for M28x1.5, a common fine-pitch metric thread used in machinery, automotive components, and precision assemblies.
• ISO 529 compliance: Precise geometry and lead angles designed to produce consistent threads that mate cleanly with standard nuts and bolts.
• Right-hand threading: Optimized for common manual tapping scenarios where a standard forward-cutting motion is desired.
• Three-lead variety (taper, plug/second, bottoming): Each lead serves a purpose—from guiding the thread start to finishing to full-depth threads in blind holes—providing versatile, reliable tapping in one compact set.

What’s included and how it helps your workflow

• Taper tap — the starting tap that reduces runout and helps you establish a precise thread path in the predrilled hole.
• Plug/Second tap — the finishing tap that develops the full thread depth with good tolerance control.
• Bottoming tap — reaches full thread depth in blind or deep holes, ensuring complete engagement where other taps can stop short.

Practical use and best-practice guidance

• Pair the taps with a quality threading fluid or light oil to reduce friction, extend tool life, and produce smoother cuts.
• Ensure your workpiece is securely clamped and the tap is aligned true to the hole to prevent cross-threading.
• Begin with the taper tap to establish guide threads, then progress through the plug and bottoming taps for a clean, accurately formed metric thread.
• Choose a predrilled hole size appropriate for M28x1.5 threads and the chosen depth; use a gentle cutting action and take wide, even turns to minimize chatter and burrs.

Ideal for whom and what it solves

• Professional machinists and hobbyists who need dependable, ready-to-use metric tapping tools for maintenance, repairs, and fabrication projects.
• Applications spanning automotive components, equipment housings, aluminum or steel chassis work, and any project requiring precise M28x1.5 threads.
• A compact, ready-to-hand solution that reduces downtime by covering start, finish, and full-depth tapping in a single set.

Care, storage, and longevity tips

• Clean away chips after tapping and wipe the taps to prevent corrosion.
• Store in a protective organizer to preserve tip geometry and reduce the risk of dulling edges.
• Inspect each tap before use and replace if surfaces show pitting or significant wear to maintain thread quality on future jobs.

Designed for accuracy, durability, and versatility, the Wiseman Metric Fine HSS Hand Tap Set ISO 529 - M28x1.5 is a reliable companion for anyone tackling metric threading with confidence and consistent results.