Lockwood C4 577 Dual Access Lower Cylinder – Keying Options

Lockwood 577 Dual Access Lower Cylinder

The Lockwood 577 Dual Access Lower Cylinder forms part of the trusted Lockwood C4 keyway system and is engineered for use with Synergy® 3577 and DX series mortice locks. Designed for commercial and specialised security applications, this cylinder provides dependable performance with controlled keying options to suit a wide range of access requirements.

Dual Access Design with Controlled Keying Options

This configuration features a dual access mechanism, allowing the lock to be operated from both sides. It is available in multiple keying profiles including Keyed Alike (5KA), Keyed Different (5KD), Restricted Profile (5CK), and Master Keyed (6MK), making it suitable for everything from single-door installations to large master key systems.

The robust brass construction and precision pin-tumbler mechanism ensure smooth operation and long service life in demanding environments.

Key Features and Compatibility

• Cylinder Type: Oval 577 Lower Cylinder

• Keyway System: Lockwood C4

• Functionality:

  • Dual access operation from both sides

• Keying Options:

  • 5CK – Restricted commercial profile

  • 5KA – Keyed Alike

  • 5KD – Keyed Different

  • 6MK – Master Keyed

• Finish Options:

  • Satin Chrome

  • Chrome Plate

  • Polished Brass

• Construction:

  • Solid brass body

  • 5-pin tumbler mechanism (6-pin capable)

  • Standard 570 barrel format

• Compatibility:

  • Lockwood Synergy® 3577 mortice locks

  • DX series mortice locks

  • Inline Airlock trailer locks