Import BDNA-20721 Straight Flute Tap 12-24 Unc Hss

Product Description

The IMPORT BDNA-20721 is a straight flute tap designed to cut 12-24 UNC internal threads in a wide range of workpiece materials. It features 4 flutes and a taper chamfer, which distributes cutting load across several leading threads to ease entry and reduce torque during initial thread engagement. The tap is manufactured from high-speed steel (HSS) and carries a gold oxide coating that provides mild lubricity and corrosion resistance during storage and cutting operations. This tap is suited for use by machinists, maintenance technicians, and field service pros working on threaded fastener repairs or new thread creation in metal components.

This tap is commonly used in general-purpose machine shop environments, maintenance and repair operations (MRO), and field service applications where 12-24 UNC threaded holes are required. The taper chamfer style makes it appropriate for through-hole threading where the tap can pass fully through the material. It is well matched to drilling and tapping operations on mild steel, aluminum, brass, and similar machinable materials. Packaged as a single tap per unit, it fits standard hand tap wrench or machine tap holder setups.

Key Features

• 12-24 UNC thread form for standard unified coarse pitch fastener compatibility
• Taper chamfer distributes cutting load and reduces entry torque in through-hole applications
• 4 straight flutes for efficient chip clearance in through-hole threading
• High-speed steel construction provides wear resistance across a range of workpiece materials
• Gold oxide coating adds mild lubricity and protects against surface corrosion during storage
• H3 thread limit maintains consistent fit tolerance for standard 12-24 UNC threaded assemblies

Compatibility

Designed for use in standard hand tap wrenches or machine tap holders that accept straight-shank taps in the 12-24 UNC size range. No specific compatible model or system data was provided in the product input.

Installation Notes

Tapping operations should be performed by a qualified machinist or maintenance technician using the appropriate tap drill size for a 12-24 UNC thread before tapping. Always apply cutting fluid to reduce heat and extend tap life. Secure the workpiece fully before beginning to prevent movement during thread cutting. Taper taps are intended for through-hole applications and should not be used as a bottoming tap in blind holes without following up with a plug or bottoming style tap.