四川电力送变电金属结构加工厂地脚螺栓加工收货检验要求四川电力送变电金属结构加工厂地脚螺栓加工收货检验要求外径 d螺距 t中经 d2内径 d1工作高度 h备注M424.539.07737.1292.436M454.542.07740.1292.436M48544.75242.5882.706M52548.75246.5882.706M565.552.42850.0462.977M605.556.42854.0462.977M64660.10357.5053.248附计算公式：h=0.5413*t；d1=d-2h=d-1.0826*t；d2=d-0.6495*t;原始三角形高度 H=0.866*t。说明：本检验要求摘自于 GB192-81,所有外协加工地螺按本要求检验收货。设计底线：项目M45M48M52M56M60M64M68M72内径 d139.1641.5145.5148.8552.8556.2160.2164.21净面积 S12.0413.5216.2618.7421.9424.8128.47工作高度h2.4362.7062.7062.9772.9773.2483.2483.248外径 d44.03246.92250.92254.80458.80462.70666.70670.706