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Haiyan Shangjia Hardware Co., Ltd., founded in 2008, has years of experience specializing in the manufacturing of custom bolts and screws. We focus on research and development as well as production of non-standard fasteners, aiming to streamline manufacturing processes while enhancing product quality and consistency. Our solutions help customers boost efficiency and have earned us positive feedback. Currently, we produce a range of non-standard fasteners, including welding screws, flange bolts, adjusting bolts, and construction fastener assemblies. Our products are widely used in industries such as automotive, home appliances, furniture, and construction. We export primarily to Europe and Japan and supply many domestic electrical appliance and auto parts manufacturers. Equipped with multiple multi-station molding machines—including models 84L, 134L, 135L, and 14B6S—along with supporting equipment, we have extensive hands-on experience from mold design to production. Recently, we invested in an automatic optical screening machine to further guarantee the consistent quality of our finished products.
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