1、.表3 标准紧固件扭矩值序号名 称规 格性能等级备注4.8 (4)8.8（8）10.9(10)扭矩值(Nm)1螺栓、螺母M411.52333.82M52347683M6367111013 4M768121617225M8811183225356M81612203427387M101722365550638M101.251824407063809M10120254272658810M12303962788710911M121.5324165819111412M121.25344268859511913M121354470889912514M1445609912414017515M141.5536
2、710713415018816M141.25566911113915619517M141587211514416220218M1618710917521824630819M18210613321326629937420M201175219350438490610注1：表中所标注的4.8为螺栓机械性能等级； 4为螺母机械性能等级。注2：表中M8、M10扭矩值根据制造公司实际使用扭矩值进行了调整。表4 塑料覆盖件用螺钉扭矩序号名 称规 格扭矩值(Nm)备 注4.88.81螺钉M411.51.52.52M5233.55.53M634694M881116225M1013222530表5 自攻螺钉扭矩值
3、规 格ST3.5ST4.2ST4.8ST5.5 扭 矩 值（N.m）1.52.32.54.03.56.06.0 8.5A.1 紧固件最小破坏扭矩见表A.1。表A.1 紧固件最小破坏扭矩规 格螺 距mm最 小 破 坏 扭 矩 (Nm)备注性 能 等 级8.810.9M40.73.604.40M50.87.609.30M6113.0016.00M60.7516.7520.48M7123.0028.00M81.2533.0040.00138.0046.000.7545.7655.95M101.566.0081.00184.00102.001.2575.0091.00M121.75118.00145.001.5131.00160.001.25145.00176.001157.00192.00注1：最小破坏扭矩值适用于精度等级为6g、6f、6e的螺纹。注2：本表M4M10最小破坏扭矩值源自GB/T 3098.13-1996 紧固件机械性能 螺栓与螺钉的扭矩试验和破坏扭矩 公称直径110mm，M12为理论计算值。A.2 自攻螺钉最小破坏扭矩值见表A.2。表A.2 自攻螺钉最小破坏扭矩值规 格ST3.5ST3.9ST4.2ST4.8ST5.5最小破坏扭矩(Nm)2.73.44.46.310注：本表数据源自GB/T 3098.5-2000 紧固件机械性能 自攻螺钉。.
