Import BDNA-20728 Straight Flute Tap 5/8-11 Unc Hss

Product Description

The IMPORT BDNA-20728 is a straight flute tap designed for cutting internal threads in a wide range of materials. It produces 5/8-11 UNC right-hand threads using a taper chamfer that eases thread engagement at the start of the cut. Constructed from high-speed steel (HSS) with a gold oxide coating, this tap resists wear and mild corrosion during use. The 4-flute configuration provides stable cutting action and chip clearance in through-hole and blind-hole applications. It carries a thread limit designation of H3, indicating a tight tolerance class suited to standard UNC threading work. Machinists, maintenance technicians, and tool-and-die workers are the primary users.

This tap is used in machine shops, maintenance and repair operations, and general manufacturing environments. The taper chamfer style makes it well suited as a starting tap, gradually entering the hole before full thread engagement is achieved. It is appropriate for ferrous and non-ferrous metals, plastics, and similar materials where 5/8-11 UNC threads are required. The right-hand thread direction is standard for the vast majority of threading applications in these trades.

Key Features

• 5/8-11 UNC thread form with right-hand thread direction
• Taper chamfer for easy thread starting and progressive engagement
• 4-flute design provides stable cutting and reliable chip evacuation
• High-speed steel construction for durability across a range of workpiece materials
• Gold oxide coating adds surface hardness and mild corrosion resistance
• H3 thread limit for consistent tolerance control on standard UNC fits

Compatibility

Designed as an OEM-style replacement or direct-use straight flute tap for standard 5/8-11 UNC threading operations in machine tool, maintenance, and general fabrication applications.

Installation Notes

This tap is installed by machinists and maintenance technicians using a tap wrench, tapping head, or CNC rigid tapping setup. Always ensure the workpiece is securely fixtured and the tap is properly aligned with the drilled pilot hole before beginning the threading operation. Use an appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Power down or disengage any machine spindle before manually handling or changing the tap.