
Short plate with cylinder hole and cover Stainless steel (AISI 304) for outside of the door | GSV-No. 6658 ZK / 1
21. November 2022
Dogs for yacht doors | GSV-No. 9046
29. November 2022Mortise latch with anti-vibration latch brass / stainless steel (304) | GSV-No. 3220
SKU: 3220
Standard productThe small mortise latch lock with crank latch in brass or alternatively stainless steel (A2) | GSV-No. 3220 is a compact, precisely manufactured locking element designed for doors with standardized cutouts. This lock is characterized by its high-quality workmanship, robust construction, and the option of choosing between two proven materials. The crank latch ensures smooth and quiet door closing while securely engaging in the frame. By operating the handle, the latch is reliably retracted, enabling convenient and effortless daily use.
The lock is available with a latch made either of brass or stainless steel A2. The brass version offers excellent wear resistance, robust mechanics, and long-lasting sliding properties. The stainless steel A2 version provides outstanding corrosion resistance, high strength, and resilience against moisture as well as external influences. This makes the lock suitable for both interior use and environments with higher demands on durability and service life.
The lock case is solidly manufactured, ensuring the required stability to withstand daily stresses. Supplied without a strike plate, the lock can be flexibly combined with various door systems. Its manufacture according to common standards allows for easy installation in standardized door openings. It is also compatible with commercially available door handles and requires only minimal maintenance. Clearly identified by GSV-No. 3220, the product represents quality, reliability, and long-term usability. This small mortise latch lock is a functional and durable solution for doors.
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 | |
| Area of product installation | Doors industrial shipbuilding standard, Doors Yachtbuilding, Internal doors railway vehicles |
| Product type |
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%.
The 2° incline is specified by the shipbuilding norm DIN

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)
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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