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1、 DIN2676 紧固件产品等级 F 紧固件 Product grade F 产品等级 F DIN 267 Part 6 第 6 部分 Mechanische Verbindungselemente;technische Lieferbedingungen,Ausfhrungen und Magenauigkeit fr Produktklasse F 产品等级 F 紧固件；发货技术条件；设计与尺寸精确度 In keeping with current practice in standards published by the International Organization for S
2、tandardization(ISO),a comma has been used throughout as the decimal marker.为了与国际标准组织（ISO）的现行标准条例相符，使用逗号作十进制标记。Dimensions in mm 尺寸单位毫米 1 Scope and field of application 1 适用范围与领域 This standard specifies tolerances for product grade F screws,bolts and nuts with thread diameters from 1 to 3 mm.本标准全面说明了产
3、品等级 F 的螺纹直径为 1-3 毫米的螺丝、螺钉与螺母的公差。It is recommended that this standard should also be used for non-standardized fasteners.本标准同样适用于非标准化的紧固件。Product grade F generally refers to the quality of products for which stringent requirements are made with respect to tolerances(e.g.in precision mechanics).产品等级 F
4、 泛指根据产品质量所制定的严格公差要求（如在精确的技工中）。2 Thread diameters 2 螺纹直径 Table 1 表 1 Thread diameter 螺纹直径 Tolerance 1)公差1)Internal thread 内螺纹(nuts)(螺母）External thread 外螺纹(bo1ts and screws)(螺钉与螺丝）1 1.4 5H 4h 1.4 3 6H 6g 1)Plated threads shall not infringe the maximum material limit with zero fundamental deviation.1）电
5、镀螺纹不得违反零度基本偏差的最大材料限制。3 Thread lengths 3 螺纹长度 P=pitch of thread P=螺距 4 Nominal lengths 4 公称长度 Continued on pages 2 to 5.详见第 2 页到第 5 页。5 Driving geometry 5 驱动几何体 5.1 Widths across flats and widths across corners 5.1 平面的宽度与角度的宽度 The specified tolerances for widths across flats and the minimum widths ac
6、ross corners apply to fasteners where the height of hexagons,m,is equal to 0,7 m or more:本标准的平面宽度与最小角度宽度公差适用于高度很多于 0.7 米的六角螺母的紧固件。5.2 Slots 5.2 插槽 Table 2 表 2 Slot width,n 插槽宽度,n Nominal value 公称值 Tolerance 公差 0.3 C11 0.3 1.4 3 h13 h13 Table 4 表 4 Thread diameter 螺纹直径 Tolerance on D2)直径公差2)1 1.4 h10
7、 1.4 0.8 1.2 h12 h13 1.2 h13 7 Thickness of nuts 7.螺母厚度 8 Shank diameters 8 柄径 The shank diameter is approximately equal to the pitch diameter.柄径约等于中径。9 Geometrical tolerances 9 形位公差 Table 6 表 6 Figure No 图号 Feature 图像 Tolerance based on dimension 尺寸公差 1 S 2 D 3 d 4 d 5 d 6 d 7 d 8 d 9 d 10 d 11 d 12 S 13 14 15 16 Explanatory notes 注释 This standard has been prepared by Normenausschu Feinmechanik und Optik(Precision Mechanics and Optics Standards Committee).本标准由精密技工与光学标准委员会制备。