四方槽沉頭螺釘 (ASTM F837/F468) [TABLE 2.2.1-2 III] ASME B 18.6.3 (H1B-III) - 2024
| 選擇規(guī)格尺寸 點(diǎn)擊↓ 2# 3# 4# 5# 6# 8# 10# 12# 1/4 5/16 3/8 |
尺寸單位:
inch |
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![ASME B 18.6.3 (H1B-III) - 2024 四方槽沉頭螺釘 (ASTM F837/F468) [TABLE 2.2.1-2 III]](https://img.164580.com/upload/48/pic_cadpara/460_zh.png?ue=1747212739&local=cache&tp=canvas&pict=png)
![美標(biāo)ASME B18.6.3 (H1B-III) - 2024 ASME18.6 四方槽沉頭螺釘 (ASTM F837/F468) [TABLE 2.2.1-2 III]](https://img.164580.com/upload/48/pic/2023/12/07/1701939524711725180.jpg)
![ASME B 18.6.3 (H1B-III) - 2024 四方槽沉頭螺釘 (ASTM F837/F468) [TABLE 2.2.1-2 III]](https://img.164580.com/upload/48/qrcode_standardurl/24908.png)
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| ①,頭部邊緣為倒圓或平的。 ②,小于等于長度L的螺釘，為清根沉頭型。 ③,機(jī)械螺釘?shù)穆菁y長度： 1）螺紋規(guī)格≤5#: 公稱長度≤3倍公稱直徑的應(yīng)為滿扣產(chǎn)品，頭下螺紋肩距≤1倍螺距。 公稱長度＞3倍公稱直徑到 1-1/8 in 的，允許頭下肩距最大不超過2倍螺距。 若無其他規(guī)定，長螺釘?shù)淖钚÷菁y長度為1 in 。 2）螺紋規(guī)格≥6#: 公稱長度≤3倍公稱直徑的應(yīng)為滿扣產(chǎn)品，頭下螺紋肩距≤1倍螺距。 公稱長度＞3倍公稱直徑到 2 in 的，允許頭下螺紋肩距最大不超過2倍螺距。 若無其他規(guī)定，長螺釘?shù)淖钚÷菁y長度為 1.5 in 。 ④,R代表正常插入深度，S代表短（淺）插入深度。 ⑤,方槽內(nèi)壁略帶斜度。這個(gè)斜度會導(dǎo)致因鍍層在槽內(nèi)的積聚而導(dǎo)致成品緊固件的插入深度測量受限。表中的凹槽插入尺寸適用于成品（鍍層）產(chǎn)品。制造商應(yīng)注意，在生產(chǎn)過程中應(yīng)為其留出必要的加工余量。 |
長度公差
Machine screws can be made to any length, but they are generally produced in fractional length increments of 1/16 in. for screws up to 5/8 in. long, 1/8 in. for screws over 5/8 in. through 1-1/2 in. long, and 1/4 in. for screws over 1-1/2 in. long.
標(biāo)稱螺釘尺寸的長度公差 | |||
標(biāo)稱螺釘長度 | 螺紋規(guī)格 | ||
0000~00 | 0~12 | 1/4~3/4 | |
≤1/2 | -0.01 | -0.02 | -0.03 |
＞1/2,≤1 | -0.02 | -0.03 | -0.03 |
＞1,≤2 | / | -0.06 | -0.06 |
＞2 | / | -0.09 | -0.09 |
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