HC422 Heavy Duty Stainless Steel Top-Hung Window Friction Stay, 304 Stainless Steel 22mm Track Hinge with 45° Opening for Large Aluminum Top-Hung Windows

HC422 top-hung window friction stay is manufactured from premium 304 stainless steel via precision stamping process, delivering exceptional corrosion resistance, structural rigidity and long service life even under heavy sash load and harsh outdoor weather conditions. The 22mm extra-wide slide track provides enhanced structural stability and smooth, jitter-free opening and closing movement, perfectly accommodating the weight and operation of large top-hung window sashes. Its sliding shoe adopts a double-pivot structural design, which evenly distributes mechanical force during window operation, significantly improving overall load-bearing capacity, wind pressure resistance and long-term wear durability. The support link arms come in three thickness options: 2.0mm, 2.5mm and 3.0mm, with a full range of length specifications covering 10", 12", 14", 16", 18", 20" and 24". Customizable 5-link and 6-link linkage configurations are available to match different load requirements and window dimensions. Engineered based on mechanical structure principles, this friction stay enables stepless positioning at any opening position, allowing users to adjust the window opening angle freely and keep it securely in place without additional fixtures. It supports a maximum opening angle of 45°, optimized for top-hung window ventilation and safety performance. This heavy-duty stay is specially engineered for large aluminum top-hung window systems, widely used in high-rise residential buildings, commercial facades and large-scale window renovation projects. Bulk wholesale orders and OEM customization services are fully supported.