hb 7686-2001 使用温度高于425℃的mj螺纹自锁螺母通用规范

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1、中华人民共和国航空行业标准BB7686一2001使用温度高于425℃的MJ螺纹自锁螺母通用规范2001一11一15发布2002一02一01实施国防科学技术工业委员会发布HB7686一2001目次前言·······························，···········.........................................................·一n1范围·······，············，···········································

2、························，·········⋯⋯12引用标准····························································································⋯⋯13要求····························································································-·····⋯⋯13.1材料············，··········

3、····················································，··················⋯⋯13.2表面涂覆················，···········································································一23.3表面状态·······················································································

4、··⋯⋯33.4标志·.....................................................................................................33.5尺寸································································································⋯⋯33.6性能·······························，···············

5、··································，·············⋯⋯33.7交货······························，·····························································⋯⋯54试验方法·····························································································⋯⋯65检验规则············

6、·················································································⋯⋯65.1检验分类····································································。····················⋯⋯65.2批的组成···············································································

7、···········⋯⋯65.3鉴定检验................................................................................................65.4验收检验···························································，···················，···⋯⋯6附录A(标准的附录)允许表面缺陷的类型·······································

8、···········⋯⋯巧HB7686一2001前言本标准参考国际标准ISO8641一1987<使用温度高于425℃的川螺纹自锁螺母采购规范》的有关规定并结合高温合金自锁螺母在我国航空领域的试制、使用情况编制而成。本标准与HB768