Alaks Company

End Cover MO37

The ALAKS MO37 Flat Overhang End Cap is designed for the AH59 hinged system, specifically for the flat profile Code 10137. By cleanly covering the profile edge, it delivers a uniform, refined appearance while preventing dust and moisture from entering the profile channel, contributing to long‑term durability and sealing performance.
This product has only one variant.

Description

Alaks MO37 Overhang Cap | Flat Mullion End Cap for AH59 System

The MO37 overhang cap is a specialized component in aluminum window hardware, developed specifically to cover the ends of flat (Flat) mullion profiles in the AH59 hinged system. This cap, also known as flat overhang cap or flat mullion end cap, plays a critical role in completing the installation process and enhancing both the visual and technical quality of aluminum doors and windows. This part is designed for the end of the central mullion of double-leaf sashes in the AH59 series, where a flat profile with code 10137 is used. Unlike the curved MO97 model, the flat design of MO37 ensures perfect fitting and a smooth, continuous appearance on flat profiles.

Dedicated Application of MO37 Overhang Cap:

The MO37 overhang cap is designed to close the end of the profile in hinged systems and performs the following functions:

  • Profile end coverage: Prevents dust, insects, and moisture from entering the inner channel of the profile.
  • Completes the visual appearance: Creates a flat and uniform surface at the meeting point of the sashes, contributing to a more aesthetic and professional look of the window.
  • Edge protection: Prevents impact and abrasion of sharp profile edges caused by repeated opening and closing.
  • Improved sealing: Partially contributes to better sealing in the end area of the mullion profile.

Technical Specifications of MO37 Overhang Cap:

  • Part Name: Overhang Cap / Sash Mullion End Cap
  • Technical Code: MO37
  • Shape / Form: Flat
  • Compatible System: AH59 (for flat profile)
  • Applicable Profile Type: Flat profile, code 10137
  • Material: Impact- and UV-resistant plastic

System Compatibility and Key Difference with MO97:

The MO37 overhang cap is specifically engineered for flat profile code 10137 in the AH59 system. This precise compatibility allows the part to fit easily into its place without excessive force, creating a straight, smooth, and unbroken visible line.

Main difference compared to MO97:

  • MO37:

    • Designed for flat (Flat) profiles
    • Has a flat visible surface
    • Compatible with profile code 10137
  • MO97:

    • Designed for curved (Softline) profiles
    • Has a defined curvature
    • Compatible with profile code 760

Using MO37 on a curved profile or MO97 on a flat profile leads to poor fitting, visible steps/level differences, reduced aesthetics, and negative impact on sealing performance.

Advantages of Using MO37 Overhang Cap:

  • Extremely accurate fitting:

    The high precision of the molding process and engineered tolerance ensure that, once mounted on the flat profile 10137, the cap locks firmly into place and does not come loose, even under severe vibration, repeated slamming of the door, or direct wind pressure.

  • Fully secure installation with self-drilling screw:

    In addition to the primary friction fit, the MO37 cap can be fixed with self-drilling screws, turning it into a permanent and rigid part of the structure. This minimizes the risk of loosening or detachment over time.

  • Weather-resistant raw material:

    The use of high-quality plastic provides excellent resistance to UV radiation, impact, and thermal expansion, ensuring long service life in outdoor conditions.

  • Preservation of profile appearance and elimination of sharp edges:

    By cleanly covering the profile end, the cap enhances the professional look of the frame and reduces the risk of injury from sharp aluminum edges.

  • Protection of the inner profile cavity:

    Prevents ingress of moisture, dust, and insects into the profile, which helps to increase the service life of the hardware and internal components.

Important Note for Correct Selection:

Always check the type of mullion profile before ordering or installation:

  • If your mullion profile is flat (code 10137), the correct choice is MO37.
  • If your mullion profile is curved (code 760), you must use MO97 to avoid uneven surfaces and misalignment in the visible area of the window.

The MO37 overhang cap is a precise, flat end cap designed for flat profile code 10137 in the AH59 hinged system. Manufactured from durable plastic and engineered with tight tolerances, it locks firmly into place and stays secure even under wind load or strong vibration. The possibility of additional fixing with self-drilling screws further increases its stability. Installing this cap completes and tidies the appearance of the profile while preventing dust and moisture from entering the profile interior.

In aluminum door systems, the use of standard hardware and high-quality finishing components is not an option but a professional necessity. 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 mark in this field, is your best partner.

The Alaks technical team provides specialized engineering consultation to help you select the right hardware for hinged and thermal break systems, ensuring compatible, standard, and long-lasting products. 📞For further information, specifications, or business inquiries, please contact us via WhatsApp: +98 912 006 7165.