Product Overview

The NPT Solid Carbide Straight Flute Pipe Tap is engineered for cutting National Pipe Taper (NPT) threads into a wide range of materials, ensuring secure and pressure-tight connections in fluid, gas, and hydraulic systems. Featuring a straight flute geometry and constructed from ultra-fine grain solid tungsten carbide, this tap is ideal for through-hole threading in rigid, abrasive, or high-volume applications.

Whether you’re machining carbon steel, stainless steel, cast iron, or non-ferrous alloys, this tool delivers consistent thread quality, tight tolerances, and long tool life—perfect for both manual and CNC production environments where durability and accuracy are non-negotiable.

Key Features

• Thread Type: NPT (National Pipe Taper), 60° thread angle

• Material: Ultra-hard solid tungsten carbide for extended tool life

• Flute Design: Straight flutes optimized for through-hole applications

• Leak-Proof Threading: Creates taper threads for pressure-tight joints

• Precision Ground: High thread profile accuracy and smooth finishes

Applications

• Machining taper pipe threads for fluid or air-tight systems in pneumatic, hydraulic, gas, and water applications

• Used in pipe fittings, valves, manifolds, machinery housings, and industrial piping systems

• Suitable for carbon steel, tool steel, cast iron, brass, aluminum, and other alloys

• Compatible with CNC tapping, automatic threading machines, and manual setups for prototyping or small batches

Advantages

• High thread consistency for air-tight and fluid-tight connections

• Rigid and durable for aggressive materials or high-speed tapping

• Ideal for through-hole operations with minimal chip congestion

• Superior wear resistance compared to HSS or cobalt taps

• Compatible with rigid tapping systems, high-speed spindles, and manual tapping fixtures

Usage Recommendations

• Match with the correct NPT pre-drilled hole diameter for best sealing results

• Use cutting oil or coolant to reduce heat and extend tool life

• Avoid in blind hole applications—use spiral flute versions for those cases

• Regularly inspect for wear to maintain thread quality and avoid galling