中华人民共和国国家标准GB1339-88小六角自锁螺母代替GB1339-77Self-locking nuts,reduced hexagon收口标记示例：d=M10的小六角自锁螺母：GB1339M10mmdH基本尺寸极限偏差基本尺寸极限偏差基本尺寸极限偏差M89640.180.15M1011105.5M12X1.513.21265(M141.5)15.5130.18M161.517.60-0.10150.229(M181.5)19.616.511M20X1.521.618120.22(M221.5)23.72012.50.26M241.525.72214中华人民共和国航空航天工业部1988-11-07批准1989-07-01实施
