End Cover MS903

The ALAKS MS903 Plastic End Cover is a specialized solution for AS55 sliding systems, precisely engineered for Profile 731. Made from high-durability, UV‑resistant plastic, it provides a perfect fit that neatly covers profile edges, blocks dust and moisture entry into the channel, and maintains the clean, unified appearance of the structure over time.

This product has only one variant.

Description

Alaks MS903 Plastic End Cap | End Cap for AS55 Sliding System

The MS903 plastic end cap is a specialized terminal cap designed for AS55 sliding doors and windows, engineered specifically to match the flat profile code 731. With its precise fitting design, this component not only creates a clean and professional appearance for the structure but also protects the end of the profile from dust and moisture entering the channel, helping to extend the service life of hardware components and sliding rails. Manufactured from engineered plastic and capable of secure fixing with a self drilling screw, the MS903 provides a stable and durable solution for both residential and commercial projects.

Why Choose the MS903 End Cap for AS55?

• Dedicated compatibility with profile 731:
Dimensions and tolerances are precisely engineered to match the geometry of profile 731 in the AS55 series, ensuring a perfect and vibration free seating.
• Suitable for high traffic environments:
In sliding systems, vibration and repeated impacts from sash movement are common. The locking design of MS903 ensures stable placement and prevents displacement.
• Improves the final appearance:
Covers the end of the profile with a clean, flat finish and eliminates the visible open channel.
Technical Specifications
• Part Code: MS903
• Target System: AS55 Sliding Window and Door System
• Compatible Profile: Code 731
• Shape: Flat
• Material: Wear and scratch resistant plastic
• Color: Black
• Installation Method: Pressure fitting + fixing with self drilling screw

Key Features and Advantages:

• Precise and durable fitting:
High precision molding ensures the cap naturally locks into position after insertion and remains secure against rail vibrations and wind pressure.
• Secure installation with self drilling screw:
With a small self drilling screw, the cap becomes practically non removable, making it ideal for windy locations or high traffic projects.
• Functional protection of the profile channel:
Prevents dust, insects, and moisture from entering the channel, helping maintain smooth rail movement and increasing hardware lifespan.
• High environmental durability:
Manufactured from high quality plastic resistant to UV radiation, thermal shock, and impact, maintaining structural stability in various environmental conditions.
• Clean and professional finishing:
Eliminates exposed profile edges and creates a uniform finished line at the end of the profile.
• Fast and cost effective installation:
No adhesive or specialized tools required; installation takes only seconds and is suitable for both factory production lines and on site installers.
Compatibility and Selection Notes
• Check the profile code first:
MS903 is specifically designed for profile 731 in the AS55 series. Using it with incompatible profiles may result in looseness or misalignment.
• Consider installation environment:
In windy areas or high traffic spaces, fixing with a self drilling screw is recommended.
• Color coordination:
For premium projects, custom color matching with the profile or other hardware may be considered when available.

Quick Installation Guide:

1.   Cleaning: Remove dust and debris from the opening of profile 731.
2.   Initial placement: Align the MS903 cap with the profile opening.
3.   Press fitting: Apply uniform pressure until the cap sits fully inside the channel.
4.   Final fixing: Tighten a suitable self drilling screw to ensure long term stability.

Applications:

• Residential and commercial aluminum sliding doors and windows
• Façade projects, balcony openings, and sliding partitions
• High traffic environments requiring durable and stable components

Frequently Asked Questions:

Can MS903 be used on profiles other than 731?
No. This cap is engineered specifically for profile 731 in the AS55 system, and optimal performance is achieved only with that profile.
Is the self drilling screw necessary for installation?
Yes. For sensitive or high traffic projects, using the screw eliminates the risk of loosening over time.

The MS903 plastic end cap is a practical component designed to close and protect the end of profile 731 in the AS55 sliding system. After installation, it prevents dust, moisture, and contaminants from entering the internal channel while giving the profile a clean and uniform finish.
Its precise design ensures secure fitting within the profile, and it can also be fixed with a self drilling screw to prevent displacement caused by repeated sash movement or vibration.

In aluminum door systems, using standard hardware and high quality finishing components is not merely an option but a professional requirement.
If you are looking for precise, durable, and engineering compliant hardware for aluminum door and window projects, Alaks, as the leading manufacturer of aluminum hardware and the only holder of the national standard certification in this field, is your best partner.
The Alaks technical team provides professional engineering consultation to help you select the most suitable hardware for hinged and thermal break systems, ensuring compatibility, standard compliance, and long term performance.

📞 For further information, specifications, or business inquiries, please contact us via WhatsApp: +98 912 006 7165.