作废 SJ 2503-1984
紧固件 十字槽沉头普通螺纹自攻螺钉 紧固件 十字槽沉头普通螺纹自攻螺钉 Cross recessed countersunk head tapping screws with common screw-thread
发布日期：1984-09-04
实施日期：1985-03-01
分类信息
发布单位或类别： 中国 行业标准-电子
CCS分类： J13机械 - 通用零部件 - 紧固件、                                                                                
ICS分类：
标准简介
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最后更新时间 2025-08-27