Extending rod lock, Symo, travel 16 mm

For combination with Symo cylinder removable core

  • Master key system organisation
  • Master key system organisation

    Locking maps are useful for organising comprehensive master key systems. They make organisation much easier. Generally, a distinction is made between two systems: Simple organisation with a master key (abbreviated to MK) and multi-level organisation with a general master key (abbreviated to GMK).

    Organisation with master key (MK locking systems)

    MK systems have several individual keys (IK) that are keyed to differ, i.e. they are not interchangeable.


    Then there is the master key (MK), which overrides all of the individual keys and therefore opens every lock in this system.


    MK locking systems are ideal for small offices with a boss and several employees.

    Organisation with general master key (GMK locking systems)

    GMK systems have both individual keys (IK) and group keys (GK) that are assigned to different IK's. Several GK's can be assigned to one master group key (MGK).


    The general master key (GMK) then overrides every key in the system.


    GMK locking systems are used for organisation in large office buildings with several departments and sub-departments.

    Closure direction and closure travel

    Closure travel for cam locks 90°

    Closure travel for cam locks 180°

    Closure direction left

    Closing direction right

    The closure travel is specified by numbers and the closure direction is specified by letters with cam locks. They refer to the installation situations shown in the tables. Locks with closure travel 180° can be altered to all closure travels. Factory set is closure travel 1.


    Locks with closure travel 90° are either left or right locking locks. The closure direction is here specified by letters. The first letter indicates the factory setting, the closure direction can be altered to the letters specified in brackets by re-positioning the locking cam (example: Closure direction A [D, F, G]).

  • Furniture lock accessories
  • Häfele Symo locking system

  • Häfele Symo cylinder removable core system
  • Symo Modular cylinder removable core system from Häfele

    Symo is a modular cylinder removable core system from Häfele. Without tools and time-consuming installation, it provides maximum flexibility at minimum costs and effort.

    Due to the variety of components within the Symo system, all present and future applications can be covered – and all this with maximum freedom during planning and execution.

    All components of the Symo system can be combined as required and exchanged, modified or upgraded at any time.

    Locking maps can be modified easily, quickly and economically. Only the cylinder core is replaced (without tools), the lock - and therefore the piece of furniture - remains untouched.

    Rational furniture production

    Since the lock and the cylinder core are separated, the locks can be pre-mounted in the furniture and are fully functional through their protective caps. The protective caps can be replaced easily and without tools by the required cylinder removable core at any time. The furniture can therefore be produced independently from its future use and from the required locking maps, and can be equipped with the required locks. This allows rational mass-production. The individual locks can be integrated into the locking map by inserting the cylinder cores at any time, even after the furniture has been set up.

    Installation and disassembly of cylinder cores without tools

    No tools are required for inserting and removing the cylinder cores, which can also be done at any time after the locks have been installed. The cylinder cores can only be inserted or removed with the lock in open position. The cylinder can be removed using a removal key.

    Maintain the cylinder cores every 6 month, but do not treat the cylinder cores with graphite!

    Flexibility and economic efficiency – at any time

    Previously, removals, changed locking maps and security requirements as well as lost keys were the weak points of every locking map which always required time-consuming and costly modification measures. Symo provides maximum flexibility even years after completion. Simply replace the cylinder cores to adapt the furniture locking concept to changed requirements. No tools are required and the installation is fast and easy.

    Whatever the requirements are: Symo is prepared.

    Plate cylinder or pin tumbler cylinder?

    With the Symo locking system you can choose between plate cylinders and pin tumbler cylinders.

    UniversalUniversal Objekt
    Premium 5Premium 20

    One protective cap, several functions!

    (1)cylinder housing

    (2)protective cap

    The protective caps for the Symo locks not only protect the interior of the cylinder housing against dirt or damages during the construction phase,

    but also function as building site keys that can be operated with a coin or screwdriver due to their design. After construction is completed, the protective caps can be removed easily without tools and replaced by the required cylinder cores

  • Häfele Symo – combinations and care instructions
  • Häfele Symo – so that you are flexible

    With Symo from Häfele you are using a mechanical furniture locking system with many advantages.

    Plate or pin tumbler cylinder? It depends on the purpose! Symo cylinders are either plate or pin tumbler cylinders. The version that is used depends on the frequency of use and the size of the locking system.

    Symo cylinder


    Area of application

    Frequency of use

    Master key system complexity

    Security requirements


    With plate cylinder

    • Office furniture series production




    • for MK systems
    • up to 2,600 key changes

    Protected from direct access

    Universal Objekt

    With plate cylinder

    • Office furniture series production

    Low to medium



    • for MK systems
    • • up to 200 key changes

    Protected from direct access

    Premium 5

    With pin tumbler cylinder

    • office furniture




    • for MK systems
    • up to 500 key changes
    • Small mail distribution systems

    Premium 20

    With pin tumbler cylinder

    • office furniture

    Medium to high



    • For MK and GMK systems
    • up to 400 key changes, depending on the complexity of the system. We provide you with competent advice.
    • Mail distribution systems
    • Display cabinets

    Care instructions

    The cylinders must be maintained once or twice a year with a graphite-free and resin-free spray, depending on the frequency of use.


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    Extending rod lock, Symo, travel 16 mm

    For combination with Symo cylinder removable core

    • Illustration shows version for right hand mounting (green)

    Note: The image may show a similar article

    Extending rod lock, Symo, travel 16 mm

    For combination with Symo cylinder removable core – Right hand

    Art. no. 237.76.611

    Extending rod lock, Symo, travel 16 mm

    For combination with Symo cylinder removable core – Left hand

    Art. no. 237.76.621
    Product details


    1 pieces

    Area of application

    For central mounting on door or panel


    Zinc alloy


    Nickel plated


    Left, right or drawer version




    For screw fixing
    Show more information
    Product Features

    Order reference

    Profile rods, rod guides and clip on stops are not included in the scope of delivery and must be ordered separately

    Corporate Office: Häfele America Co., 3901 Cheyenne Drive, Archdale, N.C. 27263
    Phone: 800.423.3531, Fax: 800.325.6197, Local Phone: 336.434.2322, Email: info@haefeleamericas.com
    19 January 2022