选择规格尺寸 点击↓ 2# 3# 4# 5# 6# 7# 8# 10# 12# 14# 1/4 16# 18# 5/16 20# 24# 3/8 |
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①,头部边缘为倒圆或平的。 ②,小于等于长度l的螺钉,为清根沉头型。 ③,7#, 14#, 16#, 18#, 20#, 24#仅用于自攻螺钉。 ④,机械螺钉的螺纹长度: 1)螺纹规格≤5#: 公称长度≤3倍公称直径的应为满扣产品,头下螺纹肩距≤1倍螺距。 公称长度>3倍公称直径到 1-1/8 in 的,允许头下肩距最大不超过2倍螺距。 若无其他规定,长螺钉的最小螺纹长度为1 in 。 2)螺纹规格≥6#: 公称长度≤3倍公称直径的应为满扣产品,头下螺纹肩距≤1倍螺距。 公称长度>3倍公称直径到 2 in 的,允许头下螺纹肩距最大不超过2倍螺距。 若无其他规定,长螺钉的最小螺纹长度为 1.5 in 。 ⑤,r代表正常插入深度,s代表短(浅)插入深度 ⑥,机械螺钉材料 1)非热处理低碳钢,如1006~1022 硬度hrb69-100 2)当机械螺钉规定硬度时,应采用中低碳钢制造,如含硼或不含硼1018~1038 硬度hrc25-38 |
1 | [美标] |
dimensions of threads and points for type ab and type abr thread-forming screws |
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2 | [美标] |
dimensions of threads and points for type b and bp thread-forming tapping screws |
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3 | [美标] |
dimensions of threads and points for type a thread-forming tapping screws |
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4 | [美标] |
dimensions of threads and points for types bf and bt thread-cutting tapping screws |
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5 | [美标] |
dimensions of threads and points for type d, f, g, and t thread-cutting tapping screws |
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6 | [美标] |
dimensions of type trs tapping screws |
类似标准及供货信息
7 | [美标] |
80° square recessed countersunk head screws |
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8 | [美标] |
metric square slot countersunk head screws |
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9 |
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[美标] asme b 18.6.3 (t10-iii) - 2013 |
方槽82°沉头清根机械螺钉 undercut 82-deg square recessed countersunk head screws, type iii |