JNF Series 400 cylinder narrow lock backset 25 mm – Titanium black PVD
The JNF Series 400 cylinder narrow lock in titanium black PVD is specially developed for narrow profile doors made of aluminium, steel, and other metal profiles. Thanks to its compact design and 25 mm backset , this mortise lock is a practical and durable solution for both residential and professional applications.
The lock is manufactured entirely from stainless steel EN 1.4301 (AISI 304) and features a high-quality PVD finish in titanium black. This combination offers good resistance to wear and corrosion and ensures a modern, stylish appearance.
The silent, reversible latch is equipped with a nylon silencer, allowing the door to close smoothly and with less noise. The lock is suitable for both left- and right-opening doors and can be combined with a European profile cylinder.
In addition, the lock features an internal spring mechanism that helps reduce play between the door handle and the spindle. The lock is supplied complete with a strike plate and mounting hardware .
Advantages of the JNF Series 400 cylinder narrow lock
- Specially designed for narrow profile doors
- Fully manufactured from stainless steel.
- High-quality titanium black PVD finish
- Backset of 25 mm
- Suitable for left- and right-opening doors
- Silent, reversible latch with nylon silencer
- Suitable for European profile cylinders
- Internal spring mechanism for stable operation of the door handle
- PC size of 85 mm and spindle of 8 × 8 mm
- Includes strike plate and mounting hardware
- According to EN 12209, use classification grade 3
Technical specifications
| Brand | JNF Architectural Hardware |
| Series | Series 400 |
| Product type | Cylinder narrow lock |
| Execution | Mortise lock |
| Application | Narrow profile doors in aluminium, steel and other metal profiles |
| Material | Stainless steel EN 1.4301 (AISI 304) |
| Colour | Titanium black |
| Finish | PVD |
| Doornmaat | 25 mm |
| PC size | 85 mm |
| Cabinet depth | 40 mm |
| Cabinet height | 174 mm |
| Front cover | 240 × 22 × 3 mm |
| Front plate corners | Law |
| Crank pin | 8 × 8 mm |
| Cylinder type | European profile cylinder |
| Day lap | Silent and reversible, with nylon silencer |
| Direction of rotation | Left and right |
| Standardization | EN 12209 |
| Usage classification | Grade 3 |
| Delivery | Lock including strike plate and mounting material |
| Sales unit | Per piece |







