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If you're doing any kind of threading in metal, this YG-1 F4 spiral flute tap is a solid choice.
It's made from high-speed steel with vanadium alloy, which gives it a great balance of hardness and toughness—so it resists wear without being brittle.
The 1/2-13 thread size with H3 tolerance makes it ideal for general purpose threading in a wide range of materials.

The steam oxide coating is a nice touch—it adds lubricity and creates tiny surface pockets that hold coolant right at the cutting edge, reducing friction and heat buildup.


This tap handles steel castings, heat-treatable alloys, free-machining stainless, corrosion-resistant stainless, aluminum alloys, and even low-to-medium carbon steels.
