Import BDNA-20705 Straight Flute Tap 12-24 Unc Hss

Product Description

The IMPORT BDNA-20705 is a straight flute tap designed to cut internal threads in ferrous and non-ferrous materials. It produces a 12-24 UNC right-hand thread with a plug chamfer, making it suitable for through-hole and moderate-depth blind-hole applications. Manufactured from high-speed steel (HSS) with a gold oxide coating, it provides improved lubricity and wear resistance compared to uncoated tooling. The tap features 4 flutes and measures 2.375 inches overall length. It is a standard production tap intended for use in machine tapping operations as well as hand tapping with an appropriate tap wrench.

This tap is used in general machining, fabrication, and maintenance applications where 12-24 UNC threads are required. The plug chamfer style — featuring a gradual lead with approximately 3 to 5 threads of chamfer — suits through-holes and open-ended blind holes where a bottoming tap is not necessary. It is commonly used by machinists, millwrights, and maintenance technicians working in production or field repair environments across industrial, HVAC, electrical, and plumbing trades.

Key Features

• 12-24 UNC thread form with right-hand thread direction
• Plug chamfer for versatile through-hole and blind-hole tapping
• High-speed steel construction for durability across a range of materials
• Gold oxide coating improves lubricity and chip evacuation
• 4-flute design provides stable cutting action and thread accuracy
• H3 thread limit for standard tolerance threading applications

Compatibility

Designed as a standard replacement or production tap for any application requiring a 12-24 UNC straight flute plug tap in high-speed steel.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician using a properly sized tap wrench or tapping head. Always apply cutting fluid appropriate for the workpiece material to extend tap life and reduce the risk of breakage. Ensure the tap is aligned perpendicular to the workpiece surface before threading begins. Follow applicable workplace safety standards when operating tapping equipment.