Precision internal threading that professionals trust. The Wiseman Threading Tools Bottom Lead Metric HSS Tap is a dedicated right-hand thread tap for M15x1.75 holes, designed to deliver clean, accurate results in a range of metals. Ground high-speed steel and uncoated for general purpose use, this tap follows ISO 529 dimensions to ensure reliable compatibility with standard taps and components.

• Thread direction and size: right-hand M15x1.75 tap, optimized for metric internal threads and standard fasteners.
• Bottom lead design: engineered for deeper engagement and consistent thread form along the full thread length, helping with through-holes and deeper taps.
• Construction: high-speed steel (HSS) ground finish, uncoated for versatile, general‑purpose use across common metals.
• Standards: complies with ISO 529 dimensions to ensure predictable tooling performance and compatibility with accompanying taps and inserts.

This tap is ideal for workshops and production setups where precise internal threads are a requirement—whether you’re fabricating new components, repairing misthreaded holes, or refurbishing mechanical assemblies. The M15x1.75 thread is a common metric standard, making this tool a dependable addition to any machinist’s kit when you’re tapping holes in mild steel, aluminum, brass, or other machinable materials.

Why choose Wiseman for threading tasks? This tap is backed by thoughtful engineering that emphasizes control, repeatability, and durability. The ground HSS construction provides a robust cutting edge, while the uncoated finish reduces friction in general-use scenarios, complementing a wide range of tapping speeds and lubricants. For best results, pair this tap with a properly sized tapping drill and a light, steady feed to achieve smooth, burr-free threads every time.