1185-4EN500 by HELI-COIL

The Heli-Coil 1185-4EN500 by Stanley Engineered Fastening is a heavy-duty tanged free-running insert engineered to form exceptionally durable, high-strength internal threads in soft metals and low-strength parent materials. Precision-rolled from premium cold-drawn 304 stainless steel wire with a diamond-shaped cross-section, this wire thread insert automatically expands outward upon installation to establish a secure, spring-like retention force without requiring staking, keying, or swaging. Designed to streamline high-volume production, it features a convenient strip-feed packaging layout that optimizes compatibility with automated or semi-automated power installation tools. By distributing joint loads evenly and eliminating localized stress concentrations, this insert provides a permanently wear-resistant thread that thoroughly shields critical industrial, automotive, and aerospace assemblies from stripping, corrosion, and thread wear.

Free-Running Profile Delivers a smooth, standard internal thread pathway that allows fasteners to rotate freely without specialized torque resistance.

Strip-Feed Layout Aligns wire inserts on a continuous plastic strip to dramatically optimize throughput when paired with high-speed power tools.

Tanged Configuration Features a traditional driven installation tang that provides clean mechanical engagement with the mandrel for controlled depth seating.

Resilient Wire Construction Utilizes a diamond-shaped cross-section that compensates for pitch and angle errors while accommodating thermal expansion and contraction.