The D Runway at Haneda Airport was constructed using the innovative “Jacket Method” to minimize environmental impact from land reclamation. As a high-raised structure over water, this runway is constantly exposed to corrosive sea air and must also withstand intense vibrations from aircraft takeoffs and landings. These conditions demand fasteners that offer both exceptional fatigue durability and corrosion resistance.

• Continuous impact and vibration from high-speed aircraft operations led to concerns about bolt loosening and fatigue.
• Salt-laden sea air created a high-risk environment for corrosion, potentially compromising fastener integrity.
• Bolt damage during maintenance and retightening efforts raised additional concerns for long-term durability.

• Installed HARDLOCK Nuts on critical structural joints to prevent loosening under dynamic load conditions.
• Eliminated the need for repeated tightening and reduced the risk of bolt thread damage.
• Improved material choice and fastening design helped mitigate the effects of salt corrosion.

• Eliminated Loosening Issues: No signs of fastener loosening even under continuous high-impact use.
• Enhanced Durability: Corrosion-related problems were minimized, extending the life of structural bolts.
• Lower Maintenance Costs: Reduced frequency of inspections and repairs due to long-term fastening stability.

HARDLOCK Nuts provide the high-performance fastening solution required for elevated coastal runways like Haneda Airport’s D Runway. With proven resistance to vibration and corrosion, HARDLOCK ensures the structural integrity and long-term safety of critical aviation infrastructure.

HARDLOCK Nuts are trusted across a wide range of highway-related applications where vibration, impact, and environmental exposure can cause fastener failure. From structural safety to traffic control equipment, HLN ensures long-term stability, reduces maintenance, and enhances public safety. Their anti-loosening performance has made them a reliable choice in numerous government and infrastructure projects.

Key Highway Applications for HARDLOCK Nut (HLN):

• Road Joints
• Soundproof Wall Joints
• Sound-Absorbing Panels
• Illuminating Equipment & Base Plate Fastening
• Direction Boards
• Jet Fans in Tunnel Systems
• Grating Joints
• Guard Rail Joints
• ETC (Electronic Toll Collection) Boards
• Information Display Boards
• Storm Drain Cover Securing

Whether it’s mounted signage, safety barriers, or tunnel ventilation systems, HARDLOCK Nuts deliver unmatched fastening integrity in even the harshest traffic environments.