The 4x4x3mm UL certified stainless steel butt hinge is a high-performance hinge designed specifically for use in fire-rated door assemblies. Crafted from durable 304 OR 316 stainless steel, it offers excellent corrosion resistance, making it ideal for both interior and exterior applications, including environments with high humidity or exposure to chemicals. This hinge measures 4 inches in height, 4 inches in width, and has a 3mm thickness, providing a compact yet sturdy solution for commercial and industrial fire doors.
Certified by Underwriters Laboratories (UL), this hinge meets rigorous fire safety standards, ensuring reliable performance under extreme heat and stress conditions. It is tested for up to 3-hour fire-rated doors, making it suitable for use in hospitals, schools, office buildings, and other public facilities where safety compliance is critical. The hinge features a smooth, maintenance-free pivot and can be installed with either wood or metal doors and frames. Its square corner design and pre-drilled screw holes simplify installation and ensure a secure fit. Designed to support heavy doors while maintaining smooth, quiet operation, this UL certified stainless steel butt hinge is an essential component for maintaining both structural integrity and fire safety compliance in commercial building applications.
