JBT 6686-1993 12角头法兰面螺栓

JBT 6686-1993 12角头法兰面螺栓J13JB/T6686－199312角头法兰面螺栓1993-06-01发布1994-01-01实施中华人民共和国机械工业部发布1本标准适用于燃气轮机动力装置。d1≈0.95s注：d1为倒角圆的直径。标记：螺纹规格d=M16，螺栓长度l=100mm，材料为30CrMnSi的12角头法兰面螺栓的标记示例螺栓JB/T6686—93—M16×100·30CrMnSi表1mm螺纹规格dM6M8M10M12（M14）M16（M18）max1.902.143.524.355.155.946.91cmin1.651.893.224.054.795.586.55max9.5012.6014.3019.0021.4023.8026.20dcmin9.1412.1713.8718.4820.8823.2825.68max6.008.0010.0012.0014.0016.0018.00dsmin5.857.859.8511.8213.8215.8217.82emin8.109.2011.5013.8016.2019.6021.90基本尺寸6.408.009.5012.7015.0015.9018.00max6.518.119.6112.8315.1316.0318.13kmin6.297.899.3912.5714.8715.7717.87max7.008.0010.0012.0014.0017.0019.00smin6.857.859.8511.8213.8216.8218.79机械工业部1993-06-01批准中华人民共和国机械行业标准12角头法兰面螺栓JB/T6686－19931994-01-01实施JB/T6686－19932续表1mm螺纹规格dM6M8M10M12（M14）M16（M18）max0.400.400.500.800.800.801.00rmin0.280.280.380.550.550.550.75Z1.01.21.52.02.5螺纹规格dM20（M22）M24（M27）M30（M33）M36max6.825.907.987.989.219.6210.82cmin6.466.547.357.358.789.1910.39max28.6033.3038.1038.1042.8047.5052.30dcmin28.0832