Import BDNA-20701 Straight Flute Tap 5-40 Unc Hss

Product Description

The IMPORT BDNA-20701 is a straight flute plug tap designed for cutting right-hand internal threads in ferrous and non-ferrous materials. Built from high-speed steel with a gold oxide coating, it produces 5-40 UNC threads and features a plug chamfer style, making it suitable for through-hole and general-purpose tapping applications. The 2-flute straight flute design provides good chip clearance in standard machining conditions. At 1-15/16 inches overall length, this tap is compact and fits standard tap handles and machine setups used in production and maintenance environments. The H2 thread limit ensures accurate tolerance control for close-fitting threaded assemblies.

This tap is used in machine shops, maintenance and repair operations, and light manufacturing where 5-40 UNC threads are required. It is suited for tapping soft metals, plastics, and mild steels in hand tapping or low-speed machine tapping applications. The plug chamfer style — typically 3 to 5 threads of lead — makes it a versatile choice when starting a thread from the entry side of a through hole or in partially blind applications where adequate clearance exists at the bottom.

Key Features

• 5-40 UNC thread form with right-hand thread direction for standard fastener compatibility
• Plug chamfer style provides a gradual lead-in, suitable for through holes and most general tapping tasks
• High-speed steel construction delivers wear resistance across a range of workpiece materials
• Gold oxide coating reduces friction and helps resist corrosion during storage and use
• H2 thread limit ensures controlled tolerance for accurate thread fit
• 2-flute straight flute geometry supports chip evacuation in open, non-interrupted cuts

Compatibility

Designed as a standard replacement or production tap for applications requiring 5-40 UNC right-hand internal threads in through-hole or adequately cleared blind-hole configurations.

Installation Notes

This tap is installed by qualified machinists or maintenance technicians using a standard tap handle or tapping machine. Always ensure the workpiece is securely fixtured before tapping. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Do not force the tap if resistance increases unexpectedly — back off to clear chips and prevent breakage.