T3585-04EPF168 - Screw Threaded Insert by Helicoil Stanley Engineered Fastening

The Heli-Coil® T3585-04EPF168 is a tangless, screw-locking wire thread insert precision-manufactured from Inconel X-750 with a Primer Free II coating. Built for high-performance applications in extreme high-temperature and harsh environments, it creates permanent, high-strength #4-40 UNC internal threads in low-density parent materials. Featuring an advanced tangless design, it eliminates tang break-off and removal steps, accelerating assembly cycles while preventing foreign object debris (FOD) risks in sensitive components. Internal resilient locking coils exert constant radial pressure on the mating fastener to prevent vibration-induced loosening, while the Primer Free II finish reduces insertion torque and prevents galling without secondary lubricants.

Tangless Wire Construction eliminates tang break-off and retrieval steps, shortening assembly time and completely preventing foreign object debris (FOD) hazards.

Screw-Locking Mechanism features internal locking coils that securely grip bolts to prevent rotational loosening under severe shock and vibration without lock washers.

Inconel X-750 Superalloy delivers exceptional thermal stability, extreme heat resistance, and high tensile strength in demanding environments.

Primer Free II Coating lowers insertion torque and protects against thread galling and seizing without needing liquid primers or external lubricants.

#4-40 UNC Coarse Threading reinforces soft parent metals and repairs worn internal threads in high-precision, space-constrained assemblies.