JBT 6687-1993 12角法兰面螺母

JBT 6687-1993 12角法兰面螺母J13JB/T6687－199312角法兰面螺母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。标记：螺纹规格D=M16，材料30CrMnSi表面处理为镀镉钝化的12角法兰面螺母的标记示例螺母JB/T6687—93—M16·30CrMnSi—Cd.D表1mm螺纹规格DM6M8M10M12M16max7.109.4011.5013.5017.70dbmin7.049.3411.4413.4317.63emin8.9811.2313.5115.7521.42基本尺寸911121720max9.1811.2112.2117.2120.26mmin8.8210.7911.7916.7919.74max8.0010.0012.0014.0019.00Smin7.889.8511.8513.8218.79max1.201.401.602.502.50Cmin0.951.151.352.252.25max11.0013.0016.5021.0026.70dcmin10.8212.8216.3220.7926.49m′min34468重量（只）kg≈0.00210.00380.00660.01260.0262螺纹规格DM20M24M27M30×3M34×3max21.9026.0029.0033.0036.00dbmin21.8225.9228.9232.9235.90机械工业部1993-06-01批准中华人民共和国机械行业标准12角法兰面螺母JB/T6687－19931994-01-01实施JB/T6687－19932续表1mm螺纹规格DM20M24M27M30×3M33×3emin27.1233.9636.2040.7646.46基本尺寸2332343941max23.2632.3134.3139.3141.31mmin22.7431.6933.6938.6940.69max24.0030.0032.0036.0041.00Smin23.7929.7931.7535.7540.75max3.004.504.505.505.50Cmin2.754.204.205.205.20max31.2041.3041.3054.0054.00dcmin30.9541.0541.0553.7