孔径 孔深 孔径 孔深1.80 3.2 2.0 6.52.45 4.0 2.7 8.0自攻螺丝的推荐孔径尺寸(仅供参考)钻孔直径1.82.352.93.43.94.65.3ST2.9ST3.5ST3.9ST4.6ST5.56.5螺钉最小攻入深度6.56.5螺钉规格ST2.28.08.09.59.52. C、F型自功螺钉在中碳钢、黄铜、铝合金、不锈钢板中ST6.3ST5.5ST4.8ST4.2ST3.5ST6.30.911.221.622.64材料厚度/攻入深度 钻孔直径ST2.9ST2.2螺钉规格0.450.911.620.450.911.622.031.621.601.851.952.052.302.402.602.352.803.180.711.225.705.906.002.643.180.450.911.622.032.640.713.603.802.953.103.202.903.104.751.221.622.033.184.754.750.711.221.622.643.183.F型自攻螺钉在有色金属、铝、锌、黄铜、青铜中