1185-6CN750 - Helicoil ® Threaded Insert by Stanley ® Engineered Fastening

The Heli-Coil 1185-6CN750 is a heavy-duty free-running wire thread insert designed to establish high-strength, permanent internal threads in soft metals, aluminum, and cast parent materials. Precision-formed from cold-drawn 304 stainless steel wire with a uniform diamond cross-section, this tanged insert features a resilient helical structure that expands outward to seat securely within tapped holes. Utilizing an uninhibited free-running design, it permits 3/8-16 male fasteners to thread smoothly through the coil without added prevailing torque or rotational friction until final clamp load is applied. Its 2D nominal length provides extra thread engagement, maximizing tensile load-bearing capacity and delivering outstanding stripping protection, corrosion resistance, and joint fatigue strength in demanding structural applications.

Free-Running Dynamic Rotation Delivers an unobstructed thread path that allows standard male hardware to spin freely through the helical profile without added friction or torque resistance.

Integrated Drive Tang Built with a robust drive tang on the leading coil to provide positive tool engagement for controlled and accurate insertion depth setting.

304 Stainless Steel Construction Manufactured from work-hardened, corrosion-resistant steel wire to protect soft host materials against internal thread stripping, galling, and wear.

Maximized Tensile Load Distribution The 2D nominal length distributes tension across deep thread engagement, compensating for pitch and angle variances while significantly boosting pull-out resistance.