四方槽球面圆柱头 AB ABR自攻螺钉 ASME B 18.6.3 (T22-III+T40) - 2013
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| ①,若以小数规定公称直径，应省略小数前和小数点后第四位的零。 ②,方槽内壁略带锥度，以保证插入深量规与有镀层螺钉凹槽的配合。为使插入深测量深度适用于有涂镀层的螺钉，制造者在生产（镦头）时，应为其留出必要的加工余量。 ③,表中的“R”表示正常插入深入。 ④,螺钉末端钉尖上不允许因螺纹辗压而形成的虚尖，允许略带圆弧或圆钝形末端。 ⑤,小于等于8#的螺钉，螺纹牙顶平面宽度不应超过0.004in，大于8#的应不超过0.006in。 ⑥,正常情况下，当螺钉长度小于等于其公称长度L0时应采用全螺纹，过渡螺纹长度应小于等于Y；若螺钉长度大于其公称长度L0可采用半牙型式，但其螺纹长度应不小于b。 |
采用标准
注：技术数据仅供参考，请以官方原件为准！
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