Balax 11402-010 Thread Forming Sti Tap 6-32 Unc H2

Product Description

The BALAX 11402-010 is a thread forming STI tap designed for creating helical insert (STI) threads in ductile metals without cutting or producing chips. Using a cold-forming action, it displaces material to generate strong, work-hardened internal threads. Sized for 6-32 UNC with an H2 thread limit, this tap features a bottoming chamfer that allows threading to the bottom of blind holes. The bright, uncoated finish suits general-purpose applications in high speed steel construction. It is suited for use by machinists, maintenance technicians, and production professionals working with threaded inserts in metal components.

This tap is used in applications where Heli-Coil or similar wire thread inserts are installed to repair or reinforce tapped holes in aluminum, mild steel, and other ductile materials. The bottoming chamfer makes it appropriate for shallow or blind-hole situations where a standard or plug chamfer cannot reach full thread depth. The BXSTI series designation indicates it is purpose-built for STI thread profiles used with standard helical insert systems.

Key Features

• Thread forming action eliminates chips, reducing the risk of contamination in blind holes
• Bottoming chamfer allows full thread forming to the base of blind holes
• H2 thread limit provides controlled tolerance for reliable insert fit
• High speed steel construction provides durability across a range of ductile metals
• Bright, uncoated finish suitable for general-purpose and light-production use
• BXSTI series designed specifically for STI helical thread insert profiles

Compatibility

Designed for use with standard STI helical thread insert systems requiring a 6-32 UNC internal thread profile. The 75 percent thread drill size for this tap is 0.1620 inches.

Installation Notes

This tap is installed by machinists or maintenance technicians using a standard tap wrench or tapping fixture. The workpiece should be secured before tapping, and appropriate cutting or forming fluid should be applied to reduce friction and extend tool life. Because this is a thread forming tap, it requires more torque than a cutting tap of the same size and should only be used in ductile materials. Ensure the correct STI drill size is used prior to tapping to maintain proper thread form and insert fitment.