Balax 12083-010 Thread Forming Sti Tap 10-24 Unc H3

Product Description

The BALAX 12083-010 is a thread forming STI tap designed to cut internal threads in pre-drilled holes using a cold-forming process that displaces material rather than cutting chips. Manufactured from high-speed steel with a bright, uncoated finish, this tap produces strong, work-hardened threads well suited for production and repair applications. It carries a 10-24 UNC thread specification with an H3 thread limit and a bottoming chamfer, making it capable of threading close to the bottom of a blind hole. Overall length is 2.5 inches with a 1-inch thread length.

This tap is appropriate for threading operations in metalworking, maintenance, and repair environments where STI (Screw Thread Insert) thread profiles are required. The bottoming chamfer design is suited for blind-hole applications where full thread engagement near the bottom of the bore is needed. It is commonly used by machinists, millwrights, and maintenance technicians working with thread insert systems in industrial, commercial, and equipment-repair settings.

Key Features

• Thread forming design displaces material without cutting chips, reducing tap breakage risk and producing stronger threads
• 10-24 UNC thread size with H3 thread limit for controlled tolerance fitment
• Bottoming chamfer allows threading to the base of blind holes
• High-speed steel construction provides durability across a range of work materials
• Bright, uncoated finish suitable for general-purpose threading applications
• BXSTI series profile designed for use with screw thread insert systems

Compatibility

Designed as a replacement-style STI tap for 10-24 UNC thread insert applications requiring an H3 thread limit and bottoming chamfer. The recommended 75 percent thread drill size is 0.2220 inches.

Installation Notes

This tap is intended for use by machinists and trained maintenance technicians familiar with thread forming operations. Ensure the workpiece is secured and the correct drill size is used before tapping to avoid tap damage or thread distortion. Thread forming taps require adequate lubrication appropriate to the work material. A proper tap wrench or CNC tapping setup should be used to maintain alignment and prevent breakage.