自攻螺丝底孔设计标准.doc

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1、自攻螺丝底孔设计标准（以上数据供设计参考，请试验确认后使用）A﹑螺丝基本尺寸标准标称尺寸牙数圆形直径Dia.ofCircle三角形直径Dia.ofTriangle辗造径DesignationPith最大Max最小Min最大Max最小MinMaterialDiaM2.0402.041.961.961.881.57M2.3322.342.262.262.181.81M2.6282.642.562.552.472.07M3.0243.052.952.952.852.37M3.5203.553.453.463

2、.342.78M4.0184.053.953.913.813.14M5.0165.064.944.94.784B﹑用于钢铁或较硬金属材料时底孔直径标准标称尺寸板厚（或攻入深度）ThicknessofthematerialDesignation0.60.811.21.622.6>3.2M2.01.551.61.61.61.651.651.7M2.31.91.91.91.951.951.9522M2.62.152.152.22.22.22.252.252.3M3.02.652.652.652.72.72.

3、72.72.75M3.53.053.053.053.13.13.13.153.15M4.03.63.63.63.63.653.653.653.65M5.04.54.54.54.554.554.64.6C﹑用于铝锌铜等较软金属材料及塑料材料时底孔直径标准标称尺寸板厚（或攻入深度）ThicknessofthematerialDesignation铝﹑锌﹑铜等较软金属材料电木等硬质塑料ABS﹑PP等塑料123>4.04.0以下4.0以上5.0以下5.0以上M2.01.551.61.65M2.31.851.9

4、1.952M2.62.152.22.252.32.22.25M3.02.62.652.652.72.552.652.52.6M3.533.053.053.12.953.052.93M4.03.553.553.63.63.43.453.353.45M5.04.454.454.54.5