Plastic Corner Joint MO20

The plastic corner bracket MO20 is an important connecting component in the assembly of aluminum doors and windows for the hinged TH60 system. It is installed at the connection points of the frame or sash corners. By creating an accurate 90° corner joint, it increases frame rigidity and helps prevent looseness and profile deformation. Using a standard bracket compatible with the profile is key to assembly quality and long-term door/window durability.

This product has only one variant.

Description

MO20 Plastic Corner – Internal Connector for Hinged Aluminum Systems

The MO20 plastic corner is a specialized internal connector designed for hinged aluminum door and window systems. It is installed at the corner joints of frames or sashes and ensures a precise 90 degree angle, maintaining long term structural strength.
The MO20 corner is compatible with various hinged systems, making it an ideal choice for professional assembly lines and workshops that produce multiple aluminum systems.

Compatible Aluminum Hinged Systems:

MO20 fits several popular systems, including:
•   TH60 system
•   TH55 system
•   TH75 system
•   TH68 system
•   AH74 system
This versatility makes MO20 a multi purpose solution for manufacturers who prefer a single standard corner component suitable for different systems.

Focus on the Popular TH60 System:

Although MO20 can be used across multiple systems, its primary application is in the TH60 hinged aluminum system, known for its high sales volume and reliability.
Reasons for the TH60 system’s popularity:
•   Wide variety of frame profiles for different project conditions
•   Flexible sash configurations (door sash, window sash, dual action sash, etc.)
•   Suitable for a wide range of residential, office, and commercial applications
In such versatile systems, MO20 provides a key advantage by ensuring precise corner connections across different frame types.

Role of MO20 in Assembly Quality:

In hinged systems—especially those with active sashes—the accuracy of corner joints affects:
•   door/window alignment
•   smooth and silent sash movement
•   prevention of sagging or distortion over time
Thanks to its engineered design, MO20 provides:
•   optimal corner engagement of aluminum profiles
•   exact 90 degree positioning
•   better distribution of load and stress around corners

Material and Construction:

MO20 is made of durable engineered plastic, ideal for aluminum hardware production.
Its properties include:
•   high resistance to mechanical stress
•   sustained durability, preventing premature cracking
•   precise dimensional accuracy to eliminate looseness
•   lightweight build for faster assembly
•   excellent suitability for mass production
These characteristics make the MO20 corner a reliable solution for both standard and high traffic aluminum installations.

Applications:

The MO20 corner is used in:
•   frame corner connection of hinged systems (TH60, TH55, TH75, TH68, AH74)
•   sash and frame assembly in aluminum hinged doors and windows
•   workshop production with multiple system types
•   projects requiring precise, stable, and play free corner joints

Advantages:

•   compatible with multiple hinged systems (especially TH60)
•   provides precise and stable 90 degree corner joints
•   minimizes looseness and corner deformation
•   designed for industrial and workshop scale production
•   quick, simple push fit installation inside profile slot

Summary:

If your production line works with systems such as TH60, TH55, TH75, TH68, AH74, the MO20 plastic corner offers an economic and practical solution for durable corner connections.
As part of Alaks’s premium aluminum hardware collection, MO20 meets strict manufacturing standards and is produced with high grade raw materials under multi stage quality control.
Alaks is the largest and most reputable aluminum hardware manufacturer in the country, offering specialized components including hinges, bearings, tilt and turn sets, lift & slide systems, and aluminum profile connectors for normal and thermal break systems.
Choosing Alaks aluminum hardware ensures:
•   perfect compatibility with market standard profiles
•   extended product lifespan
•   smooth sliding and Lift & Slide operation
•   reduced installation errors

For purchasing aluminum door and window hardware, and for more information about our products as one of the largest manufacturers in the Middle East, please contact us via WhatsApp: +98 912 006 7165.