MS21209F115LSF - Screw Threaded Insert by Helicoil Stanley Engineered Fastening

The Heli-Coil MS21209F115LSF by Stanley Engineered Fastening is a high-reliability, military-standard tanged screw-locking insert optimized for reinforcing or restoring fine internal threads in low-strength parent materials. Meticulously cold-rolled from premium 304 stainless steel wire with a precision diamond-shaped cross-section, this wire thread insert compensates for pitch and angle variances to optimize joint load distribution. Designed with an advanced screw-locking configuration, it features a series of specialized straight segments or chords on the internal coils that apply a resilient, self-locking torque to the male fastener, preventing it from loosening under extreme vibration, impact, or thermal shock. Engineered for high-speed automated production lines, it features a convenient strip-feed packaging configuration that aligns the inserts on a continuous plastic carrier strip. Additionally, it features a high-grade dry film lubricant coating that significantly minimizes friction, galling, and wear during installation and operation to deliver a permanent, wear-resistant thread.

Screw-Locking Mechanism Grips the male bolt or screw with a series of specialized straight segments on the internal coils, ensuring a secure, vibration-proof joint without requiring lock-washers or auxiliary locking devices.

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

Dry Film Lubricant Greatly reduces friction during installation and prevents thread binding, galling, and wear under heavy cyclic loads.

Resilient Wire Construction Utilizes a continuous helically wound diamond profile that distributes stresses evenly across the tapped parent material to shield assemblies from thread stripping and wear.