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GBT 70.6-2020 内六角圆柱头螺钉 细牙螺纹

GB/T 70.62020

技术条件和引用标准见表2。

技术条件和引用标准见表2

表2技术条件和引用标准

TB/T 3489-2017 可控货物列车尾部安全防护装置及附属设备标记方法按GB/T1237的规定

螺纹规格为M12×1.5、公称长度1=80mm、细牙螺纹、性能等级为8.8级、表面不经处理的A级内 六角圆柱头螺钉的标记：

GB/T 70.6—2020附录A（资料性附录）钢螺钉的质量表A.1给出了商品长度规格螺钉的参考质量。表A.1钢螺钉的参考质量单位为千克M8X1M10X1M12X1.5M16X1.5M20X1.5M24X2M30X2M36X3螺纹规格M10XM12XM14X1.251.5M20 X21.25公称长度1 /mm每1000件钢螺钉的质量（p=7.85kg/dm）~1210.91612.120.92013.422.932.12515.025.435.748.071.33016.927.939.353.077.81283518.930.442.958.084.41394020.932.946.563.091.01502704522.936.150.168.097.61612855005024.939.354.573.01061723005275526.942.558.978.01141833165548706028.945.763.484.01221943305819106531.048.967.890.01302053456089507033.052.171.396.01382163636359908037.058.580.21081542413996901 0709064.989.11201702664357451 15010071.298.01321862914718001 2301101071442023165078551 3101201161562183415439101 3901301682343665799651 4701401802503916151 0201 5501502664166511 0801 63016028244168711301 7101804917591 2401 8702005418311 3502 030