OBI K3,3 Mortise Lock Right-Handed DIN 18251 Brushed Steel Silent Latch 72/55/20 WB

Product Overview

The Zamek wpuszczany OBI K3,3 is a mortise lock designed for right-handed installation in both exterior and interior doors. It conforms to DIN 18251 mechanical class for locks, ensuring compliance with recognized European durability and performance standards. Users in residential and commercial environments employ this lock where secure, silent operation and standardized fitting are required.

The most notable feature is its latch with integrated Teflon elements that minimize noise during door latching, reducing disruption in office and hospitality settings. This helps buyers address acoustic requirements in high-traffic areas and simplifies project specification for environments where quiet closures are needed. Especially recommended for bulk procurement in hotels, office buildings, and residential developments prioritizing noise-sensitive door assemblies.

Key Features

• DIN 18251 compliant ? meets European mechanical standards for mortise locks


• Teflon latch insert ? reduces noise during latch operation and minimizes wear


• Right-handed design ? tailored for standardized right-side door installations


• Suitable for exterior and interior doors ? versatile across building types


• Mechanically rated ? suited for high-frequency use scenarios


• Brushed steel finish ? resistant to corrosion and provides an understated modern look

Technical Specifications

• Mechanical Class: 72/55/20 WB


• Standard: DIN 18251


• Handing: Right-handed


• Material: Brushed steel

Applications

Commonly used in residential, hotel, office, and institutional buildings, the OBI K3,3 mortise lock is compatible with both external and internal doors. Its noise-reducing latch construction makes it suitable for spaces requiring quieter door operation, such as offices, patient rooms, and hotel corridors. Meets project requirements for DIN 18251-compliant mechanical locks in new construction and refurbishment.

Packaging & Shipping

Standard export packaging. Each unit includes the lock body, mounting hardware, and installation instructions.