HELI-COIL Screw Thread Insert STI Tap: Straight Fute, M6x1 Metric, H2 / 4H, 3 Flute

A HELI-COIL STI tap cuts internal threads to accept HELI-COIL screw thread inserts, restoring or reinforcing threads in metal, aluminum, and plastics. It is commonly used in automotive, aerospace, and industrial maintenance applications where stripped or worn threads need a durable, permanent repair.

The HELI-COIL STI tap 4687-6 is a general-purpose tap for M6x1 metric threads. It has a straight flute design with 3 flutes, a plug chamfer, and a thread tolerance of H2 / 4H. This tap is made by HELI-COIL and is designed specifically for installing screw thread inserts.

3G Electric supplies HELI-COIL STI taps worldwide, handling full logistics and customs clearance for international orders. As a global industrial solutions provider, we source genuine HELI-COIL taps like the 4687-6 and deliver them to your facility, regardless of location.

Select an STI tap that matches the thread size and pitch of the insert you are installing. For M6x1 threads, use a tap with the same pitch and a plug chamfer for through-hole repairs. Always verify the tap tolerance (e.g., H2 / 4H) matches the insert manufacturer's recommendation for proper fit.