Nylon Lock Nuts is round shape with straight thread knurling at both ends, generally pre-buried in plastic parts or injection molded parts by injection molding, hot pressing, etc. to form an internal thread, so it is figuratively called pre-buried nut, and most of the pre-buried nuts are produced with copper material, also known as pre-buried copper nut. The products are widely used in: cell phones, laptops, many kinds of plastic cases, communications, micro-motors, computers, electrical appliances, electronics, toys, clocks and watches, lighting, locomotives and other industries.

嵌装圆螺母呈圆状两端带有直纹滚花，一般采用注塑、热压等方式预埋在塑料件内或注塑件内，形成一个内螺纹，故被形象的称为预埋螺母，而大多数的预埋螺母都是采用铜材料生产，也称为预埋铜螺母。产品广泛应用于：手机、手提电脑、多种塑胶外壳、通信、微电机、电脑、电器、电子、玩具、钟表、灯饰、机车等行业。