Balax 17606-010 Extension Tap M3 X 0.5 Thread Forming Hss

Product Description

The BALAX 17606-010 is a thread forming extension tap designed for metric coarse internal threads in M3 x 0.5 applications. With an overall length of 4 inches and a thread length of 0.625 inches, this bottoming chamfer tap reaches into deeper or recessed features where standard-length taps fall short. It is manufactured from high-speed steel with a bright, uncoated finish and conforms to a 6H class of fit with a D6 thread limit. Machinists and toolroom technicians use thread forming taps of this type to produce strong, chip-free threads in ductile metals without generating the swarf associated with cutting taps.

This tap is suited for production and job-shop environments where M3 x 0.5 metric coarse threads are required in materials that respond well to cold forming, such as aluminum, mild steel, and copper alloys. The bottoming chamfer allows threading close to the bottom of blind holes. The reduced square drive length of 0.1875 inches accommodates standard tap holders and extension drivers. Right-hand flute direction and right-hand thread direction follow conventional machining practice for standard forward-direction tapping operations.

Key Features

• Thread forming design produces chip-free threads in ductile workpiece materials
• Bottoming chamfer reaches near the base of blind holes
• 4-inch overall length extends reach into deep or recessed features
• High-speed steel construction provides durability across a range of machining conditions
• 6H class of fit and D6 thread limit meet standard metric tolerance requirements
• Bright, uncoated finish suitable for use with standard cutting fluids and tapping compounds

Compatibility

Designed as an OEM-style replacement or direct-use thread forming extension tap for M3 x 0.5 metric coarse applications in standard tap holders and extension tapping chucks accepting the 0.1875-inch square drive.

Installation Notes

Thread forming taps require a properly sized forming tap drill - consult a metric thread forming drill chart before use, as the required hole diameter differs from that of a standard cut tap. Ensure the workpiece material is clamped securely and that adequate tapping lubricant or cutting fluid is applied prior to engagement. Always back the tap out periodically in deep blind-hole applications to relieve torque buildup. Use appropriately rated tap holders; over-torquing a small-diameter tap can result in tap breakage.