Network Rail Certificate of Acceptance PA05/02077 – Hardlock Nuts
Staytite Hardlock Nuts are covered by Network Rail Certificate of Acceptance PA05/02077, supporting approved rail fastening applications where connection security and vibration resistance are critical.

Hardlock Nuts for Rail Applications:
Hardlock Nuts are designed to resist self-loosening caused by vibration, shock and dynamic loading, making them suitable for demanding rail environments.
Applications include:
- Points and crossings
- Fishplate and fishbolt assemblies
- Track infrastructure components
- High-vibration bolted joints
Complete the form below to access the certificate documentation:
