Baer Heli Coil Tap - Wire Thread Insert - Spiral Flute Tap (STI) - Metric - M3.5 x 0.6

The Baer Heli Coil Tap—Wire Thread Insert, Spiral Flute Tap (STI) in metric form, M3.5 x 0.6—delivers precise, repair-ready threads that restore strength to damaged holes. Designed for harnessing the full potential of Helicoil-style inserts, this tap configures the internal thread so fasteners engage securely and consistently, even in demanding environments.

Why this tap stands out

• Spiral flute geometry optimizes chip evacuation, reducing clogging when tapping tougher materials and enabling deeper, cleaner threads in aluminum, steel, and other alloys.
• Metric accuracy ensures the resulting thread matches standard M3.5 x 0.6 inserts, so repairs align with industry expectations and replacement fasteners.
• Rugged construction crafted from durable high-speed steel (HSS) with precise grinding for consistent size and a smooth chamfer on start, supporting repeated use in workshops and production settings.
• STI compatibility engineered to create the correct oversize hole for Helicoil-type inserts, delivering a reliable grip and long-lasting thread performance when the insert is installed.

How it works

1) Drill and pre-tap a clean pilot hole to the appropriate Ø for M3.5 x 0.6. 2) Use the Baer Heli Coil Tap with steady, perpendicular pressure and a light touch of cutting fluid to cut the oversized thread path for the insert. 3) Back off to clear chips, then install the corresponding wire thread insert with the proper installation tool. 4) The repaired thread provides a robust seat for the fastener and can endure repeated assembly and disassembly without degrading strength.

Ideal applications

• Repairing stripped or worn threads in automotive housings, aluminum brackets, and machinery enclosures where every fastener must hold securely.
• Repair projects in electronics enclosures, hobbyist metalwork, and light industrial equipment that require dependable, removable threads.
• Maintenance and service work where standard fasteners must engage with a restored internal thread that matches the original specification.

Practical guidance for best results

• Pair this tap with the matching Helicoil insert kit and installation tools for a complete repair solution.
• Use fresh lubrication and maintain a steady hand to prevent chatter and ensure a clean finish.
• Always start with the correct pilot hole and verify the final insert depth to achieve optimal load distribution.
• Inspect the repaired thread after installation to confirm smooth fastener engagement and torque behavior.

With the Baer Heli Coil Tap in M3.5 x 0.6, you gain a dependable, repeatable method to restore threaded holes to their original strength, extend component life, and keep critical assemblies performing at their best. Whether you’re a professional machinist, a maintenance technician, or a serious hobbyist, this tool delivers the precision and durability you need to tackle thread repairs with confidence.