51 NBGP Cylinder Door Lock, Dual Tone Silver & Gold, Mortice Set

51 NBGP Cylinder Door Lock

The 51 NBGP Cylinder Lock provides a reliable security solution for standard timber and composite door installations in residential and commercial environments. This mortice-style hardware set features a dual-tone finish that combines satin silver and polished gold elements to match diverse interior hardware schemes. The assembly is engineered for durability and consistent mechanical performance under high-frequency use.

Built for the Job

This hardware assembly is a standard choice for site supervisors and locksmiths requiring a versatile locking mechanism that fits common door preparations. The internal components are designed to withstand the rigors of daily operation in high-traffic areas such as office corridors or residential entry points. Because the unit utilizes a standard profile cylinder, it allows for easy re-keying or replacement without removing the entire handle set. The reversible latch bolt ensures compatibility with both left-handed and right-handed door swings, reducing the need to carry multiple SKU variations on the job site.

• Installation on internal office doors requiring keyed access.

• Residential bedroom or study doors for enhanced privacy.

• Commercial storage rooms and utility closet security.

Product Highlights

Dual-Tone Plated Finish

The combination of silver and gold plating offers high resistance to surface oxidation and manual wear.

Standard Profile Cylinder

• Compatible with standard euro-profile cutouts for simplified maintenance.
• Supplied with high-precision keys for smooth tumbler engagement.

Technical Specifications

What’s Included

• 1 x Pair of Dual-Tone Lever Handles

• 1 x Euro Profile Cylinder with 3 Keys

• 1 x Mortice Lock Body and Strike Plate

• 1 x Spindle and Installation Screw Pack

On-Site & Workshop Notes

• Confirm the backset measurement against existing door cutouts before drilling new mortice pockets.

• Apply a dry graphite lubricant to the cylinder keyway annually to maintain smooth mechanical action.

• Ensure the spindle is cut to the correct length for the specific door thickness to prevent handle binding.

• Avoid using abrasive chemical cleaners on the plated surfaces to preserve the silver and gold finish.