Cleveland C57182 Spiral Point Tap 3/8-24 Unf 3 Flute

Product Description

The CLEVELAND C57182 is a spiral point tap designed for through-hole threading in a wide range of ferrous and non-ferrous base materials. Built from high speed steel with a bright finish, it cuts a 3/8-24 UNF thread profile with a right-hand, plug chamfer entry. The 3-flute spiral point geometry pushes chips forward ahead of the tap, making it well suited for machine tapping in through-hole applications where chip evacuation matters. Thread limit is H4, and the class of fit is 2B, targeting standard tolerance threaded assemblies. Overall length is 2.9375 inches with a thread length of 0.75 inches.

This tap is used in production and maintenance machining environments where consistent UNF thread quality is required. It is appropriate for through-hole applications in alloy steel, carbon steel, and aluminum workpieces. The plug chamfer provides a gradual lead-in that distributes cutting forces across the first several threads, making it a reliable choice for CNC machining centers, drill presses, and manual tapping operations. It is commonly used by machinists, maintenance technicians, and tool-and-die professionals.

Key Features

• Spiral point geometry pushes chips forward for clean through-hole threading
• 3/8-24 UNF right-hand thread, H4 thread limit, Class 2B fit
• High speed steel construction for durability across alloy steel, carbon steel, and aluminum
• Plug chamfer for gradual thread engagement and reduced cutting force
• Bright finish with no coolant-through requirement
• Series 1011 design with 0.381-inch shank diameter

Compatibility

Designed for through-hole threading applications in alloy steel, aluminum, and carbon steel. Compatible with standard machine tapping setups requiring a 3/8-24 UNF, Class 2B thread at H4 tolerance.

Installation Notes

Install in a rigid or floating tap holder appropriate for the machine type being used. Ensure the workpiece is securely fixtured and the spindle is properly aligned before engaging the tap. Use a cutting fluid or tapping compound rated for the workpiece material to extend tool life and improve thread finish. Inspect thread form with a go/no-go gauge after initial cuts when establishing a new setup.