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Standard
| GB/T 34632-2017 The blank diameters for rolling unified screw threads (English Version) |
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Detail of GB/T 34632-2017
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Introduction of GB/T 34632-2017
本标准规定了统一螺纹搓制和滚制前的毛坯直径尺寸。统一螺纹公称直径范围为0.0600 in~ 2.0000 in（1/4 in以后只有第1系列直径；牙数系列有UNC、UNF、UNEF、8UN、12UN和16UN六种，最少牙数为6牙）；螺纹公差带有2A和3A两种。统一螺纹的牙型、直径与牙数系列和公差分别符合GB/T 20669、GB/T 20670和GB/T 20666的规定。
本标准适用于全牙型挤压工艺加工碳素钢和合金钢材料的统一螺纹。
Contents of GB/T 34632-2017