Founded in 1992, Now YongCheng hardware mechanical has been an international China coupling nut Manufacturers and coupling nut Factory. Annual production capacity of over 6,000 tons. Our products are mainly exported to below countries such as USA, Canada, Europe, Australia, Middle-east area and etc. Our clients include many big customers who specialize in anchor market. We already become one of their major anchor suppliers in China. You can also custom OEM coupling nut. We can manufacture different kinds of surface treatment process that zinc with blue-white color,white color and yellow color. Mechanical zinc plating, sherardizing galvanizing, hot-dip galvanizing which enable us can develop and produce a lot of products with different shape, different size, different material.