The metal-plasticcomposite 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。
2
The metal-plasticcomposite 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.
根据权利要求1或2所述的金属塑料复合螺帽，其特征在于所述金属嵌件一端部的内表面为锥形的密封面。
3
The metal-plasticcomposite nut, according to Claim 1 and 4, is characterized in that the metal insert is made of lead brass and stainless steel.