
Mortise WC-lockset with anti-vibration latch complete stainless steel 304 backset 55 / 65mm | GSV-No. 1311 GWC
2. February 2019
Mortise lock for profile cylinder DIN 81301 B Brass | GSV-No. 3201 Z
2. February 2019Center lock for 3-Point Locks complete stainless steel latch protrusion 19mm | GSV-No. 2439 ZM
SKU: 2439 ZM
Standard product

The center lock with GSV-No. 2439 ZM is a precisely engineered locking component designed for use in 3-point lock systems, where durability, reliability, and functional safety are essential. Manufactured entirely from stainless steel, this lock provides excellent resistance against corrosion, wear, and environmental factors, making it suitable for demanding applications and long-term use in both interior and exterior installations.
This center lock is equipped with a pin hub, which ensures stable and accurate transmission of force between the operating mechanism and the internal locking components. The design guarantees smooth and consistent operation during daily use. The latch protrusion measures 19 mm, a specification tailored to the requirements of 3-point locking systems. This precise dimension ensures that the latch engages securely and consistently, thereby enhancing the overall stability and locking performance of the door system.
The product is supplied without a cylinder or strike plate, giving flexibility to adapt it to various door configurations and system requirements. This modular approach allows integration into existing setups or the customization of new installations according to specific project needs.
The complete stainless steel construction not only ensures mechanical strength but also provides a clean, durable surface finish that requires minimal maintenance. Even under frequent use or in environments subject to moisture or temperature fluctuations, the material maintains its structural integrity and functionality.
Overall, the center lock GSV-No. 2439 ZM represents a robust and technically reliable solution for 3-point locking systems, delivering long-lasting performance, precision operation, and compatibility with professional door assemblies.
Current general delivery dates subject to the usual reservations::
Brass:
• The general delivery time for products in brass satin chromed is currently 6-8 weeks
• The general delivery time for products in brass polished / brass polished chromed is currently 8-10 weeks
Stainless Steel:
• The general delivery time for products in stainless steel is currently 6 weeks
• The general delivery time for products in stainless steel polished / fine grind is currently 6-8 weeks
Aluminum:
• The general delivery time for products in Aluminum silver andodized is currently 6 weeks
• The general delivery time for products in Aluminum powder coated is currently 6-8 weeks
Special/project products:
No standard delivery time, as components are only made to order. In each case by individual arrangement
| Weight | N/A |
|---|---|
| Product class | |
| HS-Code | |
| Product type | |
| Area of product installation | A-door (Fire protection), Doors industrial shipbuilding standard |
| Sales unit |
Note on express dispatch | 24 delivery service Each item with a stock quantity can be dispatched within 24 hours. The surcharge for the 24h delivery service is 5%.
- Shipbuilding standard: 14mm
- 16 mm according to DOT (Deprtment of Transportation)
- 19 mm according USCG (US Coast Guard)

Our products do not contain the following chemical hazardous substances:
Asbestos
Polychlorinated biphenyls (PCBs)
Chlorofluorocarbons (CFCs)
Halons
Carbon tetrachloride
1-1-1-Trichloroethane
Hydrochlorofluorocarbons
Hydrobromofluorocarbons
Methyl bromide
Bromochloromethane
Anti-fouling systems containing organotin compounds as a biocide
Cadmium and cadmium compounds
Hexavalent chromium and hexavalent chromium compounds
Lead and lead compounds larger 3%
Mercury and mercury compounds
Polybrominated biphenyl (PBBs)
Polybrominated dephenyl ethers (PBDEs)
Polychloronaphthalenes (Cl >= 3)
Radioactive substances
Certain shortchain chlorinated paraffins
Perfluorooctane sulfonic acid (PFOS)
Brominated Flame Retardant (HBCDD)
3-point locks always consist of 1 center lock (ZM) and 2 addtional latch locks (FOU) for top and bottom. The product is being supplied without rod.
The hand of door for mortise locks is defined as:
if the door is closed and the hinges are visible on the right/left, then the door is right/left hand. The door is therefore hinged on the right/left and according by definition of DIN right/left.
Or: if you grasp the handle with your right hand and latch and deadbolt show to the left, then it is right hand. If you grasp the handle with your left hand latch and deadbolt show to the right, it is a left hand.
Rim locks
The hand of door for rim locks is defined as:
if the door is closed and the hinges are visible on the right/left, then the door is right /left hand. The door is therefore hinged on the right/left and according to the definition DIN “right/left".
In addition to the designation “left” and “right”, it is to be indicated whether the locks are intended for inward or outward opening doors.
Sliding door mortises
The hand of door for sliding door mortises is the same for right and left. Sliding rim door locks different for left and right doors.
When ordering, always indicate “left” or “right”.
| Latch
The lock latch keeps the door shut. In order to open the door, it must be retracted. |
| Type of latch design | Illustration |
| single latch | ![]() |
| anti-vibration or three-piece latch | ![]() |
| rolling latch adjustable | ![]() |
| POM-latch for strike dampening | ![]() |
| Deadbolt
The deadbolt regulates the access rights through the turning motion of the cylinder by key. The deadbolt is being driven out or retracted through the turning motion. |
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| Faceplate
The faceplate is the visible part of the lock case. The faceplate, the latch and the deadbolt are the only visible parts of a mortise. |
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Handle hub
The handle hub takes the square spindle of the handle in order to retract the latch inside the lock through the turning motion of the same. This process allows the opening of the door. The shipbuilding norm specifies a 9mm square with a 2° incline. Schwepper supplies also with 8mm square, special contour or 0° incline on request. |
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WC-/privacy hub
The WC hub takes the square spindle of the olive or thumb turn, that retracts or drives out the deadbolt from the inside - analogue to the turning motion of the cylinder. The shipbuilding norm specifies a 7mm square. Schwepper supplies also with 8mm square on request. |
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| Dimension | Illustration | |
| Backset
The backset is the distance from the front edge of the faceplate to the center of the cylinder hole respectively handle hub square. The rear backset behind the center line remains always 27mm. |
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| Distancing
The distancing is the dimension from the center of the handel hub and the center of the hole for profile cylinder / privacy (WC) / key. The industry standard in shipbuilding is 75mm. |
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| Latch protrusion
The latch protrudes according to the industrial DIN standard in shibuilding 14mm. Other technical standards for latch protrusion are: 16 mm according to DOT (Department of Transportation) 19 mm according to USCG (US Coast Guard) |
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