Accupro 43034-01T Spiral Flute Tap M4 X 0.70 Tin

Product Description

The ACCUPRO 43034-01T is a spiral flute tap designed for threading M4 x 0.70 metric coarse holes in production and maintenance machining environments. Built from powdered metal with a titanium nitride (TiN) finish, this tap delivers increased hardness and wear resistance compared to standard high-speed steel. The modified bottoming chamfer allows threading closer to the bottom of blind holes. With a 42-degree helix angle and right-hand spiral flutes, the tool actively pulls chips up and out of the hole during cutting, reducing the risk of chip packing in confined bores. It measures 2.125 inches in overall length and weighs 0.1 pounds.

This tap is suited for threading M4 x 0.70 metric coarse blind holes across a range of materials including mild steels, aluminum alloys, and plastics. It is commonly used in general machining, fixture fabrication, and component repair where a 6H class of fit tolerance is required. The three-flute geometry provides good tool stability in short-chipping materials. A right-hand thread and right-hand flute direction make this tap compatible with standard CNC tapping cycles and conventional hand-tapping operations.

Key Features

• M4 x 0.70 metric coarse thread, 6H class of fit with D4 thread limit for consistent tolerance control
• Modified bottoming chamfer for threading close to the bottom of blind holes
• 42-degree helix angle promotes efficient chip evacuation in spiral-flute fashion
• Powdered metal substrate with TiN coating for extended tool life and wear resistance
• Three-flute design balances strength and chip clearance in short-chipping materials
• Right-hand thread and right-hand flute — compatible with standard tapping heads and CNC cycles

Compatibility

Designed as a standard M4 x 0.70 metric coarse spiral flute tap suitable for use in CNC machining centers, drill presses, and hand-tapping applications requiring a 6H class of fit.

Installation Notes

This tap should be installed by a machinist or maintenance technician familiar with tapping operations and toolholder requirements. Always ensure the spindle and workpiece are secure before beginning a tapping cycle. Use an appropriate cutting fluid or tapping compound for the workpiece material to maximize tool life and thread quality. For CNC applications, confirm that the tapping cycle feed rate matches the programmed pitch of 0.70 mm per revolution.