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十七螺丝杆直径是多少

更新时间: 2020-09-17 00:00:00     

除了公制螺纹和美制螺纹外还有一种BSW—英制标准,其螺纹也是以英寸为单位,俗称惠氏螺纹。美制螺纹的牙尖角也是60度,而英制螺纹的牙尖角为55度。GB5780为六角头粗杆半牙螺丝,其精度等级为C级产品,可用GB5782来代替(GB5782为六角头粗杆全牙螺丝,其精度等到级为A级和B级。)GB5781为六角头全牙螺丝,精度等级为C 级产品。

关键词: 螺丝 直径 多少

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