Balax 11703-010 Thread Forming Extension Tap 8-32 H3

Product Description

The BALAX 11703-010 is a thread forming extension tap designed for cutting internal 8-32 UNC threads in applications where standard-length taps cannot reach. Made from high-speed steel with a bright, uncoated finish, this tap uses a forming action rather than cutting flutes to displace material and create clean, strong threads without producing chips. The bottoming chamfer allows threading close to the bottom of blind holes. With an overall length of 4 inches, it provides the reach needed for recessed or deep-set workpieces. The H3 thread limit ensures consistent fit tolerance for 3B class of fit assemblies.

This extension tap is suited for use in machining, fabrication, and maintenance applications where an 8-32 threaded hole must be formed in a location inaccessible to standard-length taps. It is commonly used in precision metalworking on ductile materials such as aluminum, mild steel, and similar alloys. The thread forming design produces no chips, making it a practical choice for blind holes where chip evacuation is a concern. Machinists, tool and die makers, and maintenance technicians are the typical installers.

Key Features

• Thread forming design displaces material rather than cutting, eliminating chips in blind-hole applications
• Bottoming chamfer allows threading to the bottom of shallow or blind holes
• 4-inch overall length provides extended reach for recessed workpieces
• High-speed steel construction offers durability across a range of ductile metals
• H3 thread limit with 3B class of fit for consistent, controlled thread tolerance
• Right-hand flute direction with reduced-shank-free design for standard chuck compatibility

Compatibility

Designed as an OEM-style replacement or direct-use thread forming extension tap for 8-32 UNC applications requiring a bottoming chamfer and extended reach in the BXEXT series.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with tapping operations on metallic workpieces. Ensure the workpiece is securely fixtured and the pilot hole is sized correctly for thread forming prior to tapping. Use appropriate tapping fluid for the base material to extend tool life and improve thread quality. Do not exceed the recommended speed for the material being tapped, and back the tap out periodically if resistance increases unexpectedly.