This stainless steel flag hinge is made of 304 stainless steel precision casting, with a finished size of 80 × 80 × 3.0mm and a blade thickness of 3.0mm. It has a compact structure and excellent corrosion resistance, designed specifically for the daily high-frequency opening and closing needs of commercial metal doors. Its iconic flag shaped incision structure consists of two sets of 80mm square stainless steel joint plates and a high-strength connecting pin shaft, allowing the door leaf to rotate 360 degrees around the circumference. At the same time, the 3.0mm thick plate ensures that the hinge is not easily deformed or loose when carrying heavy metal door leaves; This model has not applied for fire or security certification, so it is only suitable for non fire rated scenarios such as ordinary commercial passage doors, office metal doors, or indoor partition metal doors. It is not recommended for door installation with mandatory fire protection requirements.
In practical applications, it is recommended to install a stainless steel flag shaped hinge with a size of 80 × 80 × 3.0mm according to the height of the door. When the door height is below 1500mm, two hinges can be installed. If it exceeds this height, an additional hinge needs to be arranged every 750mm to distribute the load and ensure the long-term stable operation of the door leaf. The surface of the hinge can be treated with wire drawing or mirror polishing, balancing rust prevention and aesthetic requirements for commercial space; Due to the use of stainless steel material and sufficient thickness, it can maintain smooth rotation in crowded commercial environments such as shopping malls, office buildings, and hotel logistics areas. When used in conjunction with metal door frames, precise positioning holes need to be made through templates to ensure perfect fit with the door leaf and door frame profiles, avoiding sagging or poor opening and closing of the door due to installation errors. As an uncertified universal commercial hardware accessory, this flag shaped hinge meets the core requirements of durability, two-way opening convenience, and low maintenance cost for ordinary commercial metal doors with an economical and practical positioning.
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