UNION C-Series 3R35 Deadlocking Latch

The UNION C-Series 3R35 Deadlocking Latch (formerly known as Chubb) is a high-security 5-detainer mortice nightlatch designed for timber doors where automatic slam-action locking is required. Featuring a robust detainer mechanism, this lock offers a significantly higher number of key combinations than standard lever locks, providing enhanced protection against lock picking and forced entry.

The UNION C-Series 3R35 Deadlocking Latch (formerly known as Chubb) is a high-security 5-detainer mortice nightlatch designed for timber doors where automatic slam-action locking is required. Featuring a robust detainer mechanism, this lock offers a significantly higher number of key combinations than standard lever locks, providing enhanced protection against lock picking and forced entry.

When the door is closed, the latch automatically deadlocks to secure the entrance. For convenience, a hold-back snib can be engaged to keep the latch withdrawn, allowing free passage when needed.

This lock is available in several configurations to suit your installation requirements. You can choose between the standard 3R35 model (where the handle can be locked from both sides) or the 3R35X escape version, which disables handle locking on the inside to ensure unrestricted egress in an emergency.

These locks are handed and available in multiple finishes and specifications. Please select your required handing (Left Hand or Right Hand), finish (Polished Brass or Satin Chrome), and manufacturer reference (3R35, 3R35X, or 3R35X RH) from the options below.

Technical Specifications

• Brand: Union C-Series (formerly Chubb)
• Mechanism: 5 Detainer
• Case Depth: 80mm
• Backset: 50mm
• Case Height: 147mm
• Centres: 56mm
• Follower: 8mm
• Bolt Throw: 10mm
• Forend Dimensions: 200mm (Length) x 25mm (Width)
• Key Differs: 25,000
• Keys Supplied: 2
• Handing: Left Hand or Right Hand (please choose from the options below)
• Finish: Polished Brass or Satin Chrome (please choose from the options below)
• Weight: 1.14kg to 1.15kg (please choose from the options below)

Key Features

• Automatic Deadlocking: Latch automatically deadlocks upon closing for immediate security.
• Detainer Mechanism: High-security 5-detainer system provides superior resistance to picking and forced entry compared to standard lever locks.
• Hold-Back Snib: Convenient snib allows the latch to be held back in the withdrawn position for unrestricted access.
• Fire Rated: EN1634-1 assessed for use on 60-minute timber fire doors.
• Escape Option Available: Choose the 3R35X variant for emergency escape doors where the inside handle cannot be locked, ensuring free egress.
• 10-Year Guarantee: Backed by a manufacturer's 10-year guarantee for long-term peace of mind.
• Chubb Heritage: Part of the renowned C-Series range, offering a direct replacement for older Chubb-branded locks.