Emuge B0203000.0968 Sti Tap M4x0.7 Cobalt Nitride 3 Flute

Product Description

The EMUGE B0203000.0968 is a spiral point STI tap designed for threading M4x0.7 metric coarse inserts in both blind hole and through-hole applications. Built from cobalt high-speed steel with a nitride finish, this tap handles demanding materials including stainless steel and general steel. The plug chamfer eases entry into the workpiece, and the 3-flute spiral point design pushes chips forward ahead of the cut to maintain clean thread formation. Overall length is 2.7559 inches with a thread length of 0.4724 inches. It is part of the Rekord B-VA series and carries a 6H (mod) class of fit, meeting the close-tolerance requirements common in STI insert thread preparation.

This tap is suited for job shops, maintenance facilities, and production environments where STI metric threads are required for helicoil-style insert installation. The M4x0.7 thread size is commonly encountered in light assemblies, automotive components, and precision machined parts made from steel or stainless steel. The spiral point geometry makes it well suited for through-hole threading where chips can exit freely, though the plug chamfer also allows it to function in blind holes when sufficient chip clearance is maintained. Installation is performed by licensed machinists or skilled trades using a tap handle, tapping machine, or CNC with rigid tapping capability.

Key Features

• Cobalt HSS construction for improved heat and wear resistance in stainless steel and alloy steel
• Nitride surface coating reduces friction and extends tool life
• Spiral point geometry pushes chips forward for clean through-hole and blind-hole thread formation
• Plug chamfer provides progressive cutting action and easy thread lead-in
• 6H (mod) class of fit for STI inserts requiring close thread tolerance
• Part of the Rekord B-VA series, designed for consistent performance in production settings

Compatibility

Designed for cutting M4x0.7 STI metric coarse threads for use with helicoil-style threaded inserts in stainless steel and steel workpieces. Suitable for blind hole and through-hole threading applications.

Installation Notes

Power down or de-energize any machine before changing tooling. Use proper tapping fluid or cutting oil rated for stainless steel to reduce heat buildup and prevent galling. Ensure correct tap alignment with the pilot hole to avoid tap breakage, particularly in harder stainless steel grades. Follow machine tool manufacturer guidelines and applicable shop safety standards when operating tapping equipment.