1191-3EN285 - Screw Threaded Insert by Helicoil Stanley Engineered Fastening

The Heli-Coil 1191-3EN285 by Stanley Engineered Fastening is a high-performance tanged free-running insert optimized for reinforcing or restoring internal threads in low-strength parent materials. Cold-rolled from high-strength Nitronic 60 stainless steel wire with a precision diamond-shaped cross-section, this wire thread insert automatically expands outward upon installation to establish a secure, spring-like retention force without the need for staking, keying, or swaging. Designed for demanding applications, its material compound eliminates the need for additional anti-seize lubricants, effectively preventing galling and thread binding during joint assembly. By compensating for pitch and angle errors, it delivers optimal load distribution and leaves behind a permanently wear-resistant thread that shields critical systems against stripping, corrosion, and structural erosion.

Free-Running Profile Provides a smooth, standard internal thread pathway that allows mating bolts and fasteners to rotate freely without locking resistance.

Nitronic 60 Composition Offers superior anti-galling performance and wear resistance, completely eliminating the need for additional lubrication when using stainless steel screws.

Tanged Configuration Utilizes a traditional driven installation tang that provides clean mechanical engagement with standard mandrels for controlled-depth seating.

Dynamic Load Distribution Features a flexible helically wound profile that minimizes localized stress concentrations by distributing static and dynamic joint loads evenly.