1191-3CN285 - Helicoil ® Threaded Insert by Stanley ® Engineered Fastening

The Heli-Coil 1191-3CN285 by Stanley Engineered Fastening is a high-strength tanged free-running insert designed to establish robust, permanent internal threads in low-density parent materials like aluminum and magnesium alloys. Precision cold-rolled from high-quality 304 stainless steel wire with a distinctive diamond-shaped cross-section, this wire thread insert automatically expands elastically outward upon installation to establish a secure, spring-like retention force without requiring keying, staking, or swaging. Designed to optimize high-volume manufacturing lines, it features a convenient strip-feed packaging configuration that seamlessly aligns inserts on a continuous plastic carrier for maximum compatibility with automated or semi-automated power installation tools. By delivering an even distribution of joint loads across the assembly, it provides a permanently wear-resistant thread that shields fine-thread connections against stripping, corrosion, and structural erosion.

Free-Running Profile Provides a smooth, conventional internal thread track that allows standard mating bolts to rotate unhindered without added torque resistance or specialized friction.

Strip-Feed Packaging Aligns wire thread inserts on a continuous plastic carrier strip to drastically accelerate production line throughput when integrated with power installation tooling.

Tanged Configuration Features a traditional driven installation tang that provides positive mechanical engagement with mandrels for controlled and highly accurate depth seating into tapped holes.

Resilient Wire Construction Utilizes a continuous helically wound diamond profile that handles thermal expansion and contraction elastically while distributing joint stresses evenly to increase parent material fatigue life.