一.高强度螺栓1.钢结构用高强度大六角螺母（GB/T1229-91）螺纹规格D12162022242730螺母厚度12.317.120.723.624.227.630.72.钢结构用高强度垫圈（GB/T1230-91）规格(螺纹大径）12162022242730垫片厚度3.84.84.85.85.85.85.83.螺栓长度计算螺栓规格（公称直径）30二.普通螺栓1.螺母 螺纹规格D681012141618GB61705.26.88.410.812.814.815.8GB6172.13.2456789GB416.47.99.512.213.915.916.9GB61755.77.59.31214.116.4GB8053455667GB812GB8899.511.914.91719.12.垫片规格(螺纹大径）681012141618GB951.61.622.52.53GB97.11.61.622.52.53GB97.21.61.622.52.53GB8523.43.53.854.354.96.35GB8532.82.93.23.43.75GB8540.50.50.51111GB8550.50.50.51111GB931.62.12.63.13.64.14.5GB9550.50.811.21.51.51.53.螺栓长度计算螺母国标GB889GB97.1166.5螺栓规格（公称直径）连接板厚1403630.75.8连接板厚1连接板厚2螺母厚度垫片厚度垫片国标只需要输入螺母国标，垫片国标，程序可以自动查询上表得出螺母厚度及垫片厚度最少需要的螺栓长度（计算基础上再预留2～3个螺距）202224273036424856641819.421.5 23.825.6313438455110111213.51518212428321920.222.324.7 26.4 31.9 34.9 38.9 45.952.420.323.928.6 34.77799912121422.827.132.638.920222427303642483445344534456.35 6.35 7.157.15 88.85555.55.566.51111.51.51.51.51.51111.51.51.51.51.555.566.87.5910.5 121.61.81.822最少需要的螺栓长度99垫片厚度605.8连接板厚2螺母厚度19.13片厚度128.3（螺栓长度计算基础上再预留2～3个螺距）距）
