Check the listing for details. NPT1/16-27 Thread Mill Helical Flute Solid Carbide 4Flute TiALN COATED. Condition: New. Listed at 45.00 USD. NPT1/16-27 Solid Carbide Thread Milling Cutter – Spiral Flute, TiAlN Coated This professional-grade solid carbide thread mill is engineered for precise internal threading of NPT1/16-27 threads. Features a full-profile spiral flute design for smooth cutting and excellent chip removal. Specifications: Thread Standard: NPT1/16-27 Flute Type: Full-tooth spiral Cutting Diameter: 5.9mm Cutting Length: 10mm Shank Diameter: 6mm Overall Length: 60mm Material: High-performance solid carbide Precision: Walter 5-axis CNC grinding Coating: Titanium Aluminum Nitride (TiAlN) advanced surface coating Application Materials: Suitable for machining carbon steel, stainless steel, cast iron, heat-treated steel, and alloy steel. Model Code: NPT1/16-27XD5.9X10HXD6X60L.