NBNP 51 Series 60mm Euro Profile Cylinder Door Lock, Silver Finish

NBNP 51 Euro Profile Lock

The NBNP 51 Cylinder Lock is a standard-duty security component engineered for integration with euro-profile mortice lock cases. This hardware provides a consistent locking mechanism for residential and light commercial door applications. It fits standard door thicknesses and works with most architectural handle sets that require a profile cylinder configuration.

Built for the Job

Site supervisors and maintenance teams select this hardware for rapid deployment across large-scale housing projects or facility upgrades. It offers a cost-effective solution for securing internal offices, storerooms, or residential entry points. The unit allows for quick installation using a single retaining screw, making it the preferred choice for high-volume maintenance contracts where speed and compatibility are essential. The silver finish provides a neutral aesthetic that matches existing satin chrome or nickel-plated door furniture commonly found on modern job sites.

• Retrofitting existing euro-profile lock cases in timber or aluminum doors.

• Maintenance cycles where locks need frequent replacement due to tenant turnover.

• New installations in residential developments requiring standard security levels.

Product Highlights

Precision Cam Mechanism

The central cam rotates smoothly to engage the mortice bolt, reducing friction and wear on internal lock components.

Durable Construction

• Manufactured from high-strength zinc alloy for impact resistance.
• Corrosion-resistant silver plating ensures longevity in humid environments.
• Standard 5-pin tumbler system provides reliable key operation.

Technical Specifications

What’s Included

• 1 x 60mm Euro Profile Cylinder

• 3 x Standard Steel Keys

• 1 x M5 Retaining Bolt (approx. 65mm)

On-Site & Workshop Notes

• Verify the backset and door thickness before installation to ensure the cylinder does not protrude more than 3mm from the escutcheon.

• When installing the fixing bolt, ensure the key is slightly turned to align the cam with the internal threads of the lock body.

• Avoid using heavy oils or grease for maintenance; a dry graphite powder is recommended to keep the pins moving freely.

• Ensure the door is properly aligned so the cam does not meet resistance when throwing the deadbolt.