Balax 12668-000 Thread Forming Tap 1/4-20 Unc Plug Hss

Product Description

The BALAX 12668-000 is a thread forming tap designed for producing internal threads in ductile metals without cutting or removing material. Unlike cutting taps, this forming tap cold-works the material to create strong, clean threads with no chips to clear. It is configured as a plug chamfer with a 4-thread lead, making it suitable for through-hole threading applications. Built from high-speed steel with a bright uncoated finish, the 12668-000 operates in the BXP series and carries an H8 thread limit. Machinists, tool-and-die tradespeople, and maintenance professionals working in metalworking and industrial maintenance environments are the primary installers.

This tap is used for right-hand threading of 1/4-20 UNC through-holes in ductile materials such as aluminum, mild steel, and similar alloys. The plug chamfer allows it to start easily in pre-drilled through-holes. A tapping depth of 1.0 inches and thread length of 0.79 inches make it well matched to standard fastener engagement depths in light to medium structural and mechanical assemblies. It is a single-piece tool intended for use in hand tapping or machine tapping setups.

Key Features

• Thread forming design eliminates chips, reducing the risk of chip-related thread damage in blind-hole-adjacent work
• 1/4-20 UNC right-hand thread profile, H8 thread limit for consistent fit with standard UNC fasteners
• Plug chamfer with 4-thread lead for easy alignment and starting in through-holes
• High-speed steel construction provides durability across a broad range of ductile workpiece materials
• Single oil groove aids lubrication flow during the forming process
• Overall length of 2.5 inches with a 0.255-inch shank diameter for compatibility with standard tap holders and chucks

Compatibility

Designed as a direct-fit replacement or standard tooling option for any setup requiring a 1/4-20 UNC plug-chamfer thread forming tap with an H8 thread limit and BXP series geometry.

Installation Notes

Thread forming taps require a specific tap drill size appropriate for forming, which is typically larger than the drill size used for cutting taps of the same thread specification - consult a thread forming drill chart before drilling the pilot hole. Secure the workpiece and ensure the tap is properly aligned before applying torque to avoid cross-threading or tap breakage. Use a suitable tapping fluid or cutting oil rated for the workpiece material to reduce forming friction and extend tap life. Always power down or de-energize any machine tool before changing or setting taps.