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| QB/T 1221-1991 Bicycle Inch Thread and Gauge (English Version) |
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Detail of QB/T 1221-1991
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Introduction of QB/T 1221-1991
本标准规定了自行车用的各种成品零件上的英制螺纹的基本牙型、基本尺寸、公差与基本偏差，并规定了自行车用英制螺纹的量规及其制造尺寸。
本标准适用于自行车用的英制螺纹。也适用于检验本标准中规定的英制螺纹尺寸和公差用的螺纹量规。
Contents of QB/T 1221-1991