等级:4.8级 工艺:冷镦 对应标准:十字槽沉头螺钉-GB 819 - 1976千支 M2M2.5M3M4M5M6M8M10 510.8 65.96.479.4 106.36.87.410.215.823.4 166.97.49.212.7182555.488.6 208.48.610.914.919.630.859.195.9 2510.510.81317.823.234.262.8103 3015.