美制螺丝规格知识
答案:3 悬赏:80 手机版
解决时间 2021-03-26 07:26
- 提问者网友:练爱
- 2021-03-25 16:03
美制螺丝规格知识
最佳答案
- 五星知识达人网友:千夜
- 2021-03-25 17:27
美制螺纹(2A)常用规格极限尺寸表
公称尺寸和每英寸牙数 螺纹系列代号 大径极限 中径极限 小径max 螺胚直径
最小 最大 最小 最大 最小 最大
8-32 UNC 0.1571 0.1631 0.1399 0.1428 0.1248 3.58 3.61
(0.164-32) 3.9903 4.1427 3.5535 3.6271 3.1699
10-24 0.1818 0.1890 0.1586 0.1619 0.1379 4.07 4.10
(0.190-24) 4.6177 4.8006 4.0284 4.1123 3.5027
12-24 0.2078 0.2150 0.1845 0.1879 0.1639 4.72 4.75
(0.216-24) 5.2781 5.4610 4.6863 4.7727 4.1631
1/4-20 0.2408 0.2489 0.2127 0.2164 0.1876 5.45 5.48
(0.250-20) 6.1163 6.3221 5.4026 5.4966 4.7650
5/16-18 0.3026 0.3113 0.2712 0.2752 0.2431 6.94 6.98
(0.3175-18) 7.6860 7.9070 6.8885 6.9901 6.1747
3/8-16 0.3643 0.3737 0.3287 0.3331 0.2970 8.40 8.44
(0.375-16) 9.2532 9.4920 8.3490 8.4607 7.5438
7/16-14 0.4258 0.4361 0.3850 0.3897 0.3485 9.83 9.87
(0.4375-14) 10.8153 11.0769 9.7790 9.8984 8.8519
1/2-13 0.4876 0.4985 0.4435 0.4485 0.4041 11.34 11.38
(0.50-13) 12.3850 12.6619 11.2649 11.3919 10.2641
9/16-12 0.5495 0.5609 0.5016 0.5068 0.4587 12.80 12.84
(0.5625-12) 13.9573 14.2469 12.7406 12.8727 11.6510
5/8-11 0.6113 0.6234 0.5589 0.5644 0.5119 14.27 14.32
(0.625-11) 15.5270 15.8344 14.1961 14.3358 13.0023
3/4-10 0.7353 0.7482 0.6773 0.6832 0.6255 17.28 17.33
(0.750-10) 18.6766 19.0043 17.2034 17.3533 15.8877
7/8-9 0.8592 0.8731 0.7946 0.8009 0.7368 20.27 20.32
(0.875-9) 21.8237 22.1767 20.1828 20.3429 18.7147
1"-8 0.9830 0.9980 0.9100 0.9168 0.8446 23.22 23.27
(1.000-8) 24.9682 25.3492 23.1140 23.2867 21.4528
公称尺寸和每英寸牙数 螺纹系列代号 大径极限 中径极限 小径max 螺胚直径
最小 最大 最小 最大 最小 最大
8-32 UNC 0.1571 0.1631 0.1399 0.1428 0.1248 3.58 3.61
(0.164-32) 3.9903 4.1427 3.5535 3.6271 3.1699
10-24 0.1818 0.1890 0.1586 0.1619 0.1379 4.07 4.10
(0.190-24) 4.6177 4.8006 4.0284 4.1123 3.5027
12-24 0.2078 0.2150 0.1845 0.1879 0.1639 4.72 4.75
(0.216-24) 5.2781 5.4610 4.6863 4.7727 4.1631
1/4-20 0.2408 0.2489 0.2127 0.2164 0.1876 5.45 5.48
(0.250-20) 6.1163 6.3221 5.4026 5.4966 4.7650
5/16-18 0.3026 0.3113 0.2712 0.2752 0.2431 6.94 6.98
(0.3175-18) 7.6860 7.9070 6.8885 6.9901 6.1747
3/8-16 0.3643 0.3737 0.3287 0.3331 0.2970 8.40 8.44
(0.375-16) 9.2532 9.4920 8.3490 8.4607 7.5438
7/16-14 0.4258 0.4361 0.3850 0.3897 0.3485 9.83 9.87
(0.4375-14) 10.8153 11.0769 9.7790 9.8984 8.8519
1/2-13 0.4876 0.4985 0.4435 0.4485 0.4041 11.34 11.38
(0.50-13) 12.3850 12.6619 11.2649 11.3919 10.2641
9/16-12 0.5495 0.5609 0.5016 0.5068 0.4587 12.80 12.84
(0.5625-12) 13.9573 14.2469 12.7406 12.8727 11.6510
5/8-11 0.6113 0.6234 0.5589 0.5644 0.5119 14.27 14.32
(0.625-11) 15.5270 15.8344 14.1961 14.3358 13.0023
3/4-10 0.7353 0.7482 0.6773 0.6832 0.6255 17.28 17.33
(0.750-10) 18.6766 19.0043 17.2034 17.3533 15.8877
7/8-9 0.8592 0.8731 0.7946 0.8009 0.7368 20.27 20.32
(0.875-9) 21.8237 22.1767 20.1828 20.3429 18.7147
1"-8 0.9830 0.9980 0.9100 0.9168 0.8446 23.22 23.27
(1.000-8) 24.9682 25.3492 23.1140 23.2867 21.4528
全部回答
- 1楼网友:长青诗
- 2021-03-25 19:27
标注方法:螺纹直径—每英寸牙数系列代号—精度等级 示例:粗牙系列 3/8—16 UNC—2A细牙系列 3/8—24 UNF—2A特细牙系列 3/8—32 UNEF—2A定螺距系列 3/8—20 UN—2A第一位数字3/8表示螺纹外径,单位为英寸,转换为米制单位mm要乘以25.4,即3/8×25.4=9.525mm;第二、三位数字16、24、32、20为每英寸牙数(在25.4mm长度上的牙数);第三位以后的文字代号UNC、UNF、UNEF、UN为系列代号,最后两位2A为精度等级。UNC:统一粗牙螺纹美制粗螺纹
美制细螺纹
规格 (UNC)标准径2级牙钻孔径规格 (UNF)标准径2级牙钻孔径
最大最小最大最小
NO.1-64(1.854)1.551.5821.425NO.0-80(1.524)1.251.3051.182
NO.2-56(2.184)1.801.8711.695NO.1-72(1.854)1.551.6121.474
NO.3-48(2.515)2.102.1461.941NO.2-64(2.184)1.851.9121.756
NO.4-40(2.845)2.302.3852.157NO.3-56(2.515)2.102.1972.025
NO.5-40(3.175)2.602.6972.487NO.4-48(2.845)2.402.4582.271
NO.6-32(3.505)2.802.8952.642NO.5-44(3.175)2.702.7402.551
NO.8-32(4.166)3.403.5303.302NO.6-40(3.505)2.903.0222.820
NO.10-24(4.826)3.903.9623.683NO.8-36(4.166)3.503.6063.404
NO.12-24(5.486)4.504.5974.344NO.10-32(4.826)4.104.1653.963
1/4 -205.105.2574.979NO.12-28(5.846)4.604.7244.496
5/16 -186.606.7316.4011/4-285.505.5885.360
3/8 -168.008.1537.7985/16-246.907.0356.782
7/16 -149.409.5509.1443/8-248.508.6368.382
1/2 -1310.8011.02310.5927/16-209.9010.0339.729
9/16 -1212.2012.44611.9891/2-2011.5011.60711.329
5/8 -
美制细螺纹
规格 (UNC)标准径2级牙钻孔径规格 (UNF)标准径2级牙钻孔径
最大最小最大最小
NO.1-64(1.854)1.551.5821.425NO.0-80(1.524)1.251.3051.182
NO.2-56(2.184)1.801.8711.695NO.1-72(1.854)1.551.6121.474
NO.3-48(2.515)2.102.1461.941NO.2-64(2.184)1.851.9121.756
NO.4-40(2.845)2.302.3852.157NO.3-56(2.515)2.102.1972.025
NO.5-40(3.175)2.602.6972.487NO.4-48(2.845)2.402.4582.271
NO.6-32(3.505)2.802.8952.642NO.5-44(3.175)2.702.7402.551
NO.8-32(4.166)3.403.5303.302NO.6-40(3.505)2.903.0222.820
NO.10-24(4.826)3.903.9623.683NO.8-36(4.166)3.503.6063.404
NO.12-24(5.486)4.504.5974.344NO.10-32(4.826)4.104.1653.963
1/4 -205.105.2574.979NO.12-28(5.846)4.604.7244.496
5/16 -186.606.7316.4011/4-285.505.5885.360
3/8 -168.008.1537.7985/16-246.907.0356.782
7/16 -149.409.5509.1443/8-248.508.6368.382
1/2 -1310.8011.02310.5927/16-209.9010.0339.729
9/16 -1212.2012.44611.9891/2-2011.5011.60711.329
5/8 -
- 2楼网友:青尢
- 2021-03-25 19:02
这种美制的螺丝,头型应该是圆头十字的机械牙螺丝,,你说的直径就是8#,换算公制的话是4.17,长度就是3/8,也就是9.53,按一寸25.4这样换算的,牙数这种有细牙也有标准的,UNF36,UNC-32,36牙的一般很少人生产的。
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