Guhring 9008030040000 Spiral Point Tap M4 X 0.70 Metric

Product Description

The GUHRING 9008030040000 is a spiral point tap designed for through-hole threading in metric applications. Built from cobalt high-speed steel with a bright finish, this tap handles M4 x 0.70 threads to a 6H class of fit. It features 3 flutes, a plug chamfer, and a right-hand thread direction. The overall length is 63 millimeters with a shank diameter of 4.50 millimeters. Cobalt construction gives it added heat and wear resistance compared to standard HSS, making it suitable for cutting threads in steel. It belongs to the GUHRING Series 803 and is sold in single-unit quantities.

This tap is intended for through-hole threading operations in metal fabrication, machining, and maintenance environments. The plug chamfer allows it to start a thread with moderate lead, making it appropriate for through-hole applications where the tap can pass completely through the workpiece. The M4 x 0.70 thread size is common in precision assemblies, small fasteners, and machine components. The D3/D4 thread limit designation keeps the pitch diameter within a tighter tolerance range, which is important for controlled fits in production threading. Licensed machinists and maintenance technicians typically use this tap on a drill press, CNC machining center, or with a tapping arm.

Key Features

• M4 x 0.70 metric thread form with 6H class of fit
• Cobalt HSS construction for improved wear resistance in steel
• 3-flute spiral point design pushes chips forward through the hole during threading
• Plug chamfer for through-hole threading applications
• D3/D4 thread limit for controlled pitch diameter tolerance
• Bright finish, right-hand cut, no coolant-through requirement

Compatibility

Designed for through-hole threading of M4 x 0.70 metric threads in steel workpieces. Fits standard tap holders and chucks sized for a 4.50-millimeter shank diameter.

Installation Notes

This tap is installed by machinists and maintenance technicians using a compatible tap holder, tapping head, or CNC rigid-tapping setup. Always ensure the tap is properly aligned with the drilled pilot hole before applying torque to avoid tap breakage. Use an appropriate cutting fluid for steel to extend tool life and improve thread quality. Inspect the tap for chipping or wear before each use, and replace if cutting edges are damaged.