Import BDNA-20780 Straight Flute Tap 7/8-14 Unf Hss

Product Description

The IMPORT BDNA-20780 is a straight flute tap designed for cutting 7/8-14 UNF internal threads in metalworking and machining applications. Built from high-speed steel (HSS) with a gold oxide coating, this tap delivers reliable performance in ferrous and non-ferrous materials. The taper chamfer lead eases thread entry and reduces the force required to start the cut. With 4 flutes and a right-hand thread direction, the BDNA-20780 is suited for through-hole and general-purpose tapping operations performed by machinists, tool-and-die makers, and maintenance technicians in production and repair environments.

This tap is used in applications requiring a 7/8-14 UNF thread form, a fine-pitch unified thread standard common in precision fastener assemblies, hydraulic fittings, and mechanical components. It is appropriate for both manual tapping with a tap wrench and machine tapping on drill presses or CNC equipment where straight flute geometry is preferred. The taper chamfer style makes it well suited for starting threads in open or through holes.

Key Features

• Thread size: 7/8-14 UNF right-hand thread
• 4 straight flutes for stable chip control in through-hole applications
• Taper chamfer lead for easier thread starting and reduced entry force
• High-speed steel construction for hardness and heat resistance
• Gold oxide coating reduces friction and provides mild corrosion resistance
• H4 thread limit for controlled pitch diameter tolerances

Compatibility

Designed as an OEM-style cutting tool for general-purpose tapping of 7/8-14 UNF threaded holes in metalworking, maintenance, and machining operations.

Installation Notes

This tap should be installed and operated by qualified machinists or maintenance technicians familiar with thread-cutting procedures. Always ensure the workpiece is securely clamped and that the tap is properly aligned with the hole axis before beginning the cut. Use appropriate cutting fluid for the material being tapped to extend tool life and improve thread quality. Follow shop safety protocols and equipment manufacturer guidelines when using in a machine tapping setup.