GB1228,1229,1230高强螺栓螺母垫圈重量计算表GB1228,1229,1230高强螺栓螺母垫圈重量计算表螺栓型号长度配套螺母数量配套垫圈垫圈数量螺栓重量螺母单重2M12501257.827.683M16451211361.514M205012207.3118.775M2210012407146.596M2410012501.7202.677M2710012665.7288.518M3010012828.3374.01垫圈单重套重10.470.1064223.40.2213133.550.3931743.340.6402755.760.8158966.521.0...