Walter-prototyp 6432576 Spiral Point Tap 5/16-18 Unc

Product Description

The WALTER-PROTOTYP 6432576 is a spiral point tap designed for through-hole threading in a wide range of metalworking applications. Built from high-speed steel (HSS) powdered metal with a Hardlube (THL) finish, it cuts a 5/16-18 UNC right-hand thread to a Class 2B fit. The plug chamfer makes it well suited for starting in through-holes without requiring a bottom-start profile. With an overall length of 3.5433 inches and a thread length of 0.7087 inches, this tap fits standard toolholding setups on CNC machining centers, drill presses, and tapping heads. Machinists and toolroom techs across job shops and production environments rely on this geometry for clean, consistent thread formation in ferrous and non-ferrous work materials.

This tap is intended for through-hole threading operations in steel, stainless steel, cast iron, and non-ferrous metals. The spiral point geometry pushes chips forward through the hole, preventing chip packing in production tapping runs. It is a solid choice for moderate-volume tapping where consistent thread quality and tool life are priorities. The 3-flute design provides a balance of chip clearance and cutting edge support across the listed material applications. Coolant-through is not available on this configuration, so flood or mist coolant delivery at the work surface is the standard approach.

Key Features

• Spiral point geometry pushes chips forward - optimized for through-hole threading
• HSS powdered metal construction for improved wear resistance over standard HSS
• Hardlube (THL) coating reduces friction and extends tool life in steel and stainless steel
• Plug chamfer for easy hole entry and reliable thread start
• Class 2B fit tolerance for standard fastener thread acceptance
• Right-hand cut, 3 flutes, suitable for steel, stainless steel, cast iron, and non-ferrous metals

Compatibility

Designed for through-hole threading of 5/16-18 UNC threads in steel, stainless steel, cast iron, and non-ferrous metal workpieces. Part of the WALTER-PROTOTYP Series EP2226302.

Installation Notes

This tap is installed by machinists and toolroom technicians in CNC tapping cycles, drill press operations, or hand tapping with a tap wrench. Ensure the spindle or holder is properly aligned with the hole axis before engaging to avoid tap breakage. Apply appropriate cutting fluid or flood coolant at the work surface since this model does not support coolant-through delivery. Power down and de-energize any CNC or drilling equipment before changing tooling per standard lockout-tagout procedures.