The metal-plastic composite nut, according to Claim 1, is characterized in that the injection molding of metal insert and complete plastic layer.
根据权利要求1所述的金属塑料复合螺帽,其特征在于所述金属嵌件与塑料层整体注塑成型。
3
The metal-plastic composite nut, according to Claim 1 and 2, is characterized in that the inner surface at one end of metal insert is cone-shaped sealing surface.