表1
公称 直径 | 0# | 1# | 2# | 3# | 4# | 5# | 6# | 8# | 10#&12# | 1/4 | 5/16 | |||||||||||
公称 长度 | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB |
0.75 | 0.25 | 0.19 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
0.88 | 0.25 | 0.19 | 0.25 | 0.17 | 0.25 | 0.16 | 0.25 | 0.15 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
1.00 | 0.50 | 0.44 | 0.25 | 0.17 | 0.25 | 0.16 | 0.25 | 0.15 | 0.25 | 0.12 | 0.25 | 0.12 | - | - | - | - | - | - | - | - | - | - |
1.25 | 0.75 | 0.69 | 0.62 | 0.55 | 0.62 | 0.54 | 0.62 | 0.52 | 0.25 | 0.12 | 0.25 | 0.12 | 0.50 | 0.34 | 0.38 | 0.22 | 0.38 | 0.17 | - | - | - | - |
1.50 |
|
| 0.88 | 0.80 | 0.88 | 0.79 | 0.88 | 0.77 | 0.75 | 0.62 | 0.75 | 0.62 | 0.50 | 0.34 | 0.38 | 0.22 | 0.38 | 0.17 | 0.50 | 0.25 | - | - |
1.75 |
|
|
|
| 1.12 | 1.04 | 1.12 | 1.02 | 0.75 | 0.62 | 0.75 | 0.62 | 1.00 | 0.84 | 0.88 | 0.72 | 0.88 | 0.67 | 0.50 | 0.25 | 0.62 | 0.35 |
2.00 |
|
|
|
|
|
| 1.38 | 1.27 | 1.25 | 1.12 | 1.25 | 1.12 | 1.00 | 0.84 | 0.88 | 0.72 | 0.88 | 0.67 | 1.00 | 0.75 | 0.62 | 0.35 |
2.25 |
|
|
|
|
|
|
|
| 1.25 | 1.12 | 1.25 | 1.12 | 1.50 | 1.34 | 1.38 | 1.22 | 1.38 | 1.17 | 1.00 | 0.75 | 1.12 | 0.85 |
2.50 |
|
|
|
|
|
|
|
|
|
| 1.75 | 1.62 | 1.50 | 1.34 | 1.38 | 1.22 | 1.38 | 1.17 | 1.50 | 1.25 | 1.12 | 0.85 |
2.75 |
|
|
|
|
|
|
|
|
|
|
|
| 2.00 | 1.84 | 1.88 | 1.72 | 1.88 | 1.67 | 1.50 | 1.25 | 1.62 | 1.35 |
3.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1.88 | 1.72 | 1.88 | 1.67 | 2.00 | 1.75 | 1.62 | 1.35 |
3.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.38 | 2.22 | 2.38 | 2.17 | 2.00 | 1.75 | 2.12 | 1.85 |
3.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.38 | 2.17 | 2.50 | 2.25 | 2.12 | 1.85 |
3.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.88 | 2.67 | 2.50 | 2.25 | 2.62 | 2.35 |
4.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 2.88 | 2.67 | 3.00 | 2.75 | 2.62 | 2.35 |
4.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3.00 | 2.75 | 3.12 | 2.85 |
4.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3.50 | 3.25 | 3.12 | 2.85 |
4.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 3.50 | 3.25 | 3.62 | 3.35 |
5.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.00 | 3.75 | 3.62 | 3.35 |
5.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.12 | 3.85 |
5.50 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.12 | 3.85 |
5.75 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.62 | 4.35 |
6.00 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 4.62 | 4.35 |
6.25 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 5.12 | 4.85 |
公称 直径 | 3/8 | 7/16 | 1/2&9/16 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 | 1-1/4 | 1-3/8 | 1-1/2 | |||||||||||
公称 长度 | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB | LG | LB |
1.75 | 0.50 | 0.19 | - | - | - | - | - | - | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.00 | 0.50 | 0.19 | 0.62 | 0.27 | - | - | - | - | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.25 | 1.00 | 0.69 | 0.62 | 0.27 | 0.75 | 0.36 | - | - | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.50 | 1.00 | 0.69 | 1.12 | 0.77 | 0.75 | 0.36 | 0.75 | 0.30 | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
2.75 | 1.50 | 1.19 | 1.12 | 0.77 | 0.75 | 0.36 | 0.75 | 0.30 | - | - | - | - | - | - |
|
|
|
|
|
|
|
|
3.00 | 1.50 | 1.19 | 1.62 | 1.27 | 1.50 | 1.12 | 0.75 | 0.30 | 1.00 | 0.50 | - | - | - | - |
|
|
|
|
|
|
|
|
3.25 | 2.00 | 1.69 | 1.62 | 1.27 | 1.50 | 1.12 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | - | - |
|
|
|
|
|
|
|
|
3.50 | 2.00 | 1.69 | 2.12 | 1.77 | 1.50 | 1.12 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
3.75 | 2.50 | 2.19 | 2.12 | 1.77 | 2.25 | 1.86 | 1.50 | 1.04 | 1.00 | 0.50 | 1.00 | 0.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
4.00 | 2.50 | 2.19 | 2.22 | 2.27 | 2.25 | 1.86 | 2.25 | 1.80 | 2.00 | 1.50 | 1.00 | 0.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
4.25 | 3.00 | 2.69 | 2.62 | 2.27 | 2.25 | 1.86 | 2.25 | 1.80 | 2.00 | 1.50 | 2.00 | 1.44 | 1.00 | 0.38 |
|
|
|
|
|
|
|
|
4.50 | 3.00 | 2.69 | 3.12 | 2.77 | 3.00 | 2.62 | 2.25 | 1.80 | 2.00 | 1.50 | 2.00 | 1.44 | 2.00 | 1.38 |
|
|
|
|
|
|
|
|
4.75 | 3.50 | 3.19 | 3.12 | 2.77 | 3.00 | 2.62 | 3.00 | 2.54 | 2.00 | 1.50 | 2.00 | 1.44 | 2.00 | 1.38 | 1.94 | 0.10 |
|
|
|
|
|
|
5.00 | 3.50 | 3.19 | 3.62 | 3.27 | 3.00 | 2.62 | 3.00 | 2.54 | 3.00 | 2.50 | 2.00 | 1.44 | 2.00 | 1.38 | 2.19 | 0.35 |
|
|
|
|
|
|
5.25 | 4.00 | 3.69 | 3.62 | 3.27 | 3.75 | 3.36 | 3.00 | 2.54 | 3.00 | 2.50 | 3.00 | 2.44 | 2.00 | 1.38 | 2.44 | 0.60 | 2.13 | 0.16 |
|
|
|
|
5.50 | 4.00 | 3.69 | 4.12 | 3.77 | 3.75 | 3.36 | 3.75 | 3.30 | 3.00 | 2.50 | 3.00 | 2.44 | 3.00 | 2.38 | 2.69 | 0.85 | 2.38 | 0.41 |
|
|
|
|
5.75 | 4.50 | 4.19 | 4.12 | 3.77 | 3.75 | 3.36 | 3.75 | 3.30 | 3.00 | 2.50 | 3.00 | 2.44 | 3.00 | 2.38 | 2.94 | 1.10 | 2.63 | 0.66 | 2.31 | 0.10 |
|
|
6.00 | 4.50 | 4.19 | 4.62 | 4.27 | 4.50 | 4.12 | 3.75 | 3.30 | 4.00 | 3.50 | 3.00 | 2.44 | 3.00 | 2.38 | 3.19 | 1.35 | 2.88 | 0.91 | 2.56 | 0.35 |
|
|
6.25 | 5.00 | 4.69 | 4.62 | 4.27 | 4.50 | 4.12 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 3.00 | 2.38 | 3.44 | 1.60 | 3.13 | 1.16 | 2.81 | 0.60 | 2.50 | 0.17 |
6.50 | 5.00 | 4.69 | 5.12 | 4.77 | 4.50 | 4.12 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 4.00 | 3.38 | 3.69 | 1.85 | 3.38 | 1.41 | 3.06 | 0.85 | 2.75 | 0.42 |
6.75 | 5.50 | 5.19 | 5.12 | 4.77 | 5.25 | 4.86 | 4.50 | 4.04 | 4.00 | 3.50 | 4.00 | 3.44 | 4.00 | 3.38 | 3.94 | 2.10 | 3.63 | 1.66 | 3.31 | 1.10 | 3.00 | 0.67 |
7.00 | 5.50 | 5.19 | 5.62 | 5.27 | 5.25 | 4.86 | 5.25 | 4.80 | 5.00 | 4.50 | 4.00 | 3.44 | 4.00 | 3.38 | 4.19 | 2.35 | 3.88 | 1.91 | 3.56 | 1.35 | 3.25 | 0.92 |
7.25 | 6.00 | 5.69 | 5.62 | 5.27 | 5.25 | 4.86 | 5.25 | 4.80 | 5.00 | 4.50 | 5.00 | 4.44 | 4.00 | 3.38 | 4.44 | 2.60 | 4.13 | 2.16 | 3.81 | 1.60 | 3.50 | 1.17 |
7.50 | 6.00 | 5.69 | 6.12 | 5.77 | 6.00 | 5.62 | 5.25 | 4.80 | 5.00 | 4.50 | 5.00 | 4.44 | 5.00 | 4.38 | 4.69 | 2.85 | 4.38 | 2.41 | 4.06 | 1.85 | 3.75 | 1.42 |
7.75 |
|
| 6.12 | 5.77 | 6.00 | 5.62 | 6.00 | 5.54 | 5.00 | 4.50 | 5.00 | 4.44 | 5.00 | 4.38 | 4.94 | 3.10 | 4.63 | 2.66 | 4.31 | 2.10 | 4.00 | 1.67 |
8.00 |
|
| 6.62 | 6.27 | 6.00 | 5.62 | 6.30 | 5.54 | 6.00 | 5.50 | 5.00 | 4.44 | 5.00 | 4.38 | 5.19 | 3.35 | 4.88 | 2.91 | 4.56 | 2.35 | 4.25 | 1.92 |
8.50 |
|
| 7.12 | 6.77 | 7.00 | 6.62 | 6.75 | 6.30 | 6.00 | 5.50 | 6.00 | 5.44 | 6.00 | 5.38 | 5.69 | 3.85 | 5.35 | 3.41 | 5.06 | 2.85 | 4.75 | 2.42 |
9.00 |
|
| 7.62 | 7.27 | 7.00 | 6.62 | 6.75 | 6.30 | 7.00 | 6.50 | 6.00 | 5.44 | 6.00 | 5.38 | 6.19 | 4.35 | 5.88 | 3.91 | 5.56 | 3.35 | 5.25 | 2.92 |
9.50 |
|
|
|
| 8.00 | 7.62 | 7.75 | 7.30 | 7.00 | 6.50 | 7.00 | 6.44 | 7.00 | 6.38 | 9.69 | 4.85 | 6.35 | 4.41 | 6.06 | 3.85 | 5.75 | 3.42 |
10.00 |
|
|
|
| 8.00 | 7.62 | 7.75 | 7.30 | 8.00 | 7.50 | 7.00 | 6.44 | 7.00 | 6.38 | 7.19 | 5.35 | 6.88 | 4.91 | 6.56 | 4.35 | 6.25 | 3.92 |
11.00 |
|
|
|
|
|
| 9.25 | 8.80 | 9.00 | 8.50 | 8.00 | 7.44 | 8.00 | 7.38 | 8.19 | 6.35 | 7.88 | 5.91 | 7.56 | 5.35 | 7.25 | 4.92 |
12.00 |
|
|
|
|
|
| 10.25 | 9.80 | 10.00 | 9.50 | 9.00 | 8.44 | 9.00 | 8.38 | 9.19 | 7.35 | 8.88 | 6.91 | 8.56 | 6.35 | 8.25 | 5.92 |
13.00 |
|
|
|
|
|
|
|
| 11.00 | 10.50 | 10.00 | 9.44 | 10.00 | 9.38 | 10.19 | 8.35 | 9.88 | 7.91 | 9.56 | 7.35 | 9.25 | 6.92 |
14.00 |
|
|
|
|
|
|
|
| 12.00 | 11.50 | 11.00 | 10.44 | 11.00 | 10.38 | 11.19 | 9.35 | 10.88 | 8.91 | 10.56 | 8.35 | 10.25 | 7.92 |
15.00 |
|
|
|
|
|
|
|
| 13.00 | 12.50 | 12.00 | 11.44 | 12.00 | 11.38 | 12.19 | 10.35 | 11.88 | 9.91 | 11.56 | 9.35 | 11.25 | 8.92 |
16.00 |
|
|
|
|
|
|
|
|
|
| 13.00 | 12.44 | 13.00 | 12.38 | 13.19 | 11.35 | 12.88 | 10.91 | 12.56 | 10.35 | 12.25 | 9.92 |
17.00 |
|
|
|
|
|
|
|
|
|
| 14.00 | 13.44 | 14.00 | 13.38 | 14.19 | 12.35 | 13.88 | 11.91 | 13.56 | 11.35 | 13.25 | 10.92 |
18.00 |
|
|
|
|
|
|
|
|
|
| 15.00 | 14.44 | 15.00 | 14.38 | 15.19 | 13.35 | 14.88 | 12.91 | 14.56 | 12.35 | 14.25 | 11.92 |
19.00 |
|
|
|
|
|
|
|
|
|
|
|
| 16.00 | 15.38 | 16.19 | 14.35 | 15.88 | 13.91 | 15.56 | 13.35 | 15.25 | 12.92 |
20.00 |
|
|
|
|
|
|
|
|
|
|
|
| 17.00 | 16.38 | 17.19 | 15.35 | 16.88 | 14.91 | 16.56 | 14.35 | 16.25 | 13.92 |
1. 表中LG为最大值,表示螺钉的最小设计夹紧长度。测量时将一个无螺纹内倒角或无沉孔的通端螺纹环规,用手尽力拧入螺纹,直到拧不动为止,此时测得的从头部支承面到螺纹环规端面之间的距离即为LG。表中LB为最小值,表达的是螺钉的最小无螺纹杆部长度。对于每一个长度规格,无螺纹杆部长度等于LG减去5倍的螺纹螺距(UNRC系列)。 2. 对于公称长度位于表左侧两档公称长度之间的规格,其LG、LB按表中相邻公称长度中较短一档的LG和LB。例如:公称直径1/4 in,公称长度1.88 in的螺钉,LG为0.50 in,LB为0.25 in。 3. 表中“-”公称长度的螺钉,为全螺纹(满扣)产品。检查时用一个无螺纹内倒角或无沉孔的通端螺纹环规,用手尽力拧入螺纹。对于公称直径从0#(0.0060 in)至5/8 in(包括5/8 in)的螺钉,其螺纹肩距最大不超过2倍螺距;对于公称直径大于1 in和长度小于最小螺纹长度LT加5倍螺距(UNRC系列)的螺钉,应为全螺纹(满扣)产品。其肩距可根据实际情况,但也应尽可能小。 4. 对于公称长度大于本表中,已规定LG和LB值所对应长度尺寸的螺钉和公称直径大于1 in的螺钉,其最大夹紧长度LG和最小无螺纹杆长LB,见表2。 LG=L-LT LB-L-LTT |
表2
螺钉公称直径 | 最小螺纹长度 LT | 最大螺纹总长度 LTT |
0(0.0600) | 0.50 | 0.62 |
1(0.0730) | 0.62 | 0.77 |
2(0.0860) | 0.62 | 0.80 |
3(0.0990) | 0.62 | 0.83 |
4(0.1120) | 0.75 | 0.99 |
5(0.1250) | 0.75 | 1.00 |
6(0.1380) | 0.75 | 1.05 |
8(0.1640) | 0.88 | 1.19 |
10(0.1900) | 0.88 | 1.27 |
12(0.2160) | 0.88 | 1.27 |
1/4(0.2500) | 1.00 | 1.50 |
5/16(0.3125) | 1.12 | 1.71 |
3/8(0.3750) | 1.25 | 1.94 |
7/16(0.4735) | 1.38 | 2.17 |
1/2(0.5000) | 1.50 | 2.38 |
9/16(0.5625) | 1.50 | 2..38 |
5/8(0.6250) | 1.75 | 2.82 |
3/4(0.7500) | 2.00 | 3.25 |
7/8(0.8750) | 2.25 | 3.69 |
1(1.0000) | 2.50 | 4.12 |
1-1/8(1.1250) | 2.81 | 4.65 |
1-1/4(1.2500) | 3.12 | 5.09 |
1-3/8(1.3750) | 3.44 | 5.65 |
1-1/2(1.5000) | 3.75 | 6.08 |
1-3/4(1.7500) | 4.38 | 7.13 |
2(2.0000) | 5.00 | 8.11 |
2-1/4(2.2500) | 5.62 | 8.99 |
2-1/2(2.5000) | 6.25 | 10.00 |
2-3/4(2.7500) | 6.88 | 10.87 |
3(3.0000) | 7.50 | 11.75 |
3-1/4(3.2500) | 8.12 | 12.63 |
3-1/2(3.5000) | 8.75 | 13.50 |
3-3/4(3.7500 | 9.38 | 14.37 |
4(4.0000 | 10.00 | 15.25 |