Hexalobular Socket Head P85 Anti-Loosening Screw
The Hexalobular Socket Head P85 Anti-Loosening Screw is built for critical structural joints that must not come loose and may not be easy to inspect. A P85 chemical adhesive is pre-applied to the thread, so the locking system travels with the part and cannot be forgotten or unevenly applied at the assembly station.
When the screw is driven in, the coating reacts and sets, locking the thread against the rotation that vibration and impact would otherwise cause. Because the reaction occurs after installation, tightening behaviour stays consistent — the screw can be seated to the specified torque before the adhesive takes hold.
The screw is made from high-strength alloy steel using precision cold-heading and thread-rolling. Rolled threads have continuous grain flow and a smooth finish, which improves fatigue and wear behaviour in joints that see repeated load cycles. The overall result is simplified assembly with dependable long-term safety.
Extensively used in automotive powertrains, rail transit, heavy industrial equipment and outdoor communication base stations, these screws are ideal for critical structural components subjected to continuous vibration, high impact or restricted maintenance access.
They meet the industry's requirement for joints that stay safe for the life of the equipment without relying on periodic re-tightening.
