8-inch, 22-slot, 2.5-thick 304 Stainless Steel Four-Link Window Strut

Product Specification

8-inch, 22-slot, 2.5-thick 304 Stainless Steel Four-Link Window Strut
This product is a load-bearing support hardware specifically designed for casement windows. It is precision-crafted from thickened 304 stainless steel sheet metal. With a standard length of 8 inches, it is compatible with 22mm slot profiles. The four-link interlocking structure ensures smooth opening and closing along with stable support, and offers excellent corrosion and rust resistance. It serves as a core load-bearing and operating component for aluminum alloy casement windows and thermal break aluminum doors and windows.

Thickened 304 Stainless Steel Base Material Meets Corrosion Resistance and Durability Standards
The entire window support is formed from a single piece of SUS304 stainless steel sheet through stamping, with a material thickness of 2.5 mm. Its robust and rigid structure provides outstanding load-bearing capacity, ensuring it remains resistant to bending or deformation even when supporting the weight of the window sash over the long term. The 304 grade naturally possesses excellent rust and corrosion resistance, having successfully passed a 500-hour salt spray test. It is suitable for long-term use in coastal high-humidity environments as well as outdoor conditions exposed to sun and rain, without rusting or becoming jammed.
All hinge points are precision-riveted, ensuring a tight fit with no play and enabling smooth, low-noise operation. The product complies with the QB/T 5338-2018 General Technical Standards for Door and Window Hardware and has passed a 100,000-cycle durability test for repeated opening and closing. It maintains stable performance even with frequent, year-round use and offers a long service life.

Four-bar linkage mechanism ensures stable support and smooth operation
The classic four-bar linkage transmission mechanism distributes force evenly during window sash opening, resulting in a smooth and stable opening and closing trajectory without jamming or wobbling. Once open, the mechanism stably supports the sash, withstanding typical wind impacts and preventing the sash from swaying and colliding with the window frame. It also limits the maximum opening angle, balancing ventilation needs with safety.
The slider ends are equipped with wear-resistant guide components, ensuring uniform sliding resistance, a smooth operating feel, and a secure lock when fully engaged, effectively enhancing the smoothness of window operation and safety during daily use.

Standard specifications ensure universal compatibility and convenient, efficient installation
Featuring a standard length of 8 inches (approximately 203 mm), it fits standard 22 mm-wide door and window profile grooves, making it a universal specification for aluminum alloy casement windows and thermal-break aluminum doors and windows. The base includes industry-standard mounting holes for precise alignment, allowing for quick assembly using standard screws. No additional cutting or grooving of the profiles is required, enabling efficient and time-saving batch assembly at door and window factories, as well as convenient replacement during home renovation and after-sales maintenance.

Wide Range of Applications
Widely compatible with outward-opening windows, top-hung ventilation windows, balcony thermal break aluminum windows, and sunroom skylights; suitable for whole-home window and door installations, high-end finishing projects for real estate developments, renovation and replacement of old windows and doors, as well as bulk export supply of window and door hardware.