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自攻螺钉的推荐钻孔尺寸C、F型自攻螺钉，在热性塑料中(mm螺纹 规格钻孔直径螺钉在盲孔 中最小插入 深度螺纹 规格钻孔直径螺钉在盲孔中最小插入深度ST2.21.86.5ST4.83.98.0ST2.92.356.5ST5.54.69.5ST3.52.96.5ST6.35.39.5ST4.23.48.0C、F、C自攻螺钉，在中碳钢、黄铜、铝合金、不锈钢和咼强度耐蚀镍铜合金板中螺纹 规格材料厚度钻孔直径螺纹 规格材料厚度钻孔直径ST2.20.451.60ST4.80.713.400.911.851.223.601.621.951.623.80ST2.90.452.052.644.100.912.33.184.301.622.44.754.502.032.6ST5.50.714.100.452.351.224.300.912.801.624.50ST3.52.644.801.622.952.033.103.184.902.643.154.755.10ST4.20.712.90ST6.31.224.800.93.101.625.201.223.202.035.401.623.403.185.702.643.704.755.903.183.806.356.00