钢丝螺套是一种新型的螺纹紧固件，装入产品后能符合国际标准高精度内螺纹，其性能优于直接攻丝形成的螺纹。随着钢丝螺套的作用逐渐被企业认识，钢丝螺套应用范围已经越来越广泛。
符号说明：
d--钢丝螺套公称直径（螺钉公称直径） L—钢丝螺套公称长度（安装后的螺纹长度） P--螺距
do--钻丝套安装用钻头直径 Dz--钢丝螺套自由状态下外径 N--钢丝螺套自由状态下圈数
英制钢丝螺套规格、螺纹护套规格参数表
|
螺纹护套规格参数
|
|
螺纹规格d×p
|
k×d
|
钢丝螺套安装后长度L(mm)
|
钻头直径do(mm)
|
自由状态下外径Dz(mm)
|
自由状态螺套圈数N(≈)
|
|
4-40
|
1d
1.5d
2d
|
2.9
4.3
5.8
|
3
|
3.66-4.04
|
3.2
5.1
7.2
|
|
5-40
|
1d
1.5d
2d
|
3.2
4.8
6.4
|
3.4
|
4.01-4.39
|
3.7
5.9
8.2
|
|
6-32
|
1d
1.5d
2d
|
3.5
5.3
7.0
|
3.7
|
4.52-4.90
|
2.8
4.8
6.8
|
|
8-32
|
1d
1.5d
2d
|
4.2
6.25
8.3
|
4.4
|
5.20-5.56
|
4.0
6.0
8.7
|
|
10-24
|
1d
1.5d
2d
|
4.8
7.2
9.6
|
5.1
|
6.19-6.58
|
3.3
5.4
7.5
|
|
12-24
|
1d
1.5d
2d
|
5.5
8.2
11.0
|
5.8
|
6.86-7.24
|
4.0
6.3
8.8
|
|
1/4"-20
|
1d
1.5d
2d
|
6.4
9.5
12.7
|
6.7
|
7.86-8.38
|
3.9
6.2
8.6
|
|
3/8"-16
|
1d
1.5d
2d
|
9.5
14.3
19.1
|
9.9
|
11.48-11.99
|
4.8
7.7
10.6
|
|
7/16"-14
|
1d
1.5d
2d
|
11.1
16.7
22.2
|
11.6
|
13.36-13.99
|
4.9
7.9
10.7
|
|
1/2"-13
|
1d
1.5d
2d
|
12.7
19.1
25.4
|
13.1
|
15.16-15.8
|
5.2
8.3
11.4
|
|
5/8"-11
|
1d
1.5d
2d
|
15.9
23.8
31.8
|
16.4
|
18.84-19.48
|
5.7
9.0
12.3
|
|
3/4"-10
|
1d
1.5d
2d
|
19.1
28.6
38.1
|
19.6
|
22.36-23.00
|
6.3
9.9
13.5
|
|
1"-8
|
1d
1.5d
2d
|
25.4
38.1
50.8
|
26.1
|
29.62-30.38
|
6.8
10.6
15.4
|
|
8-36
|
1d
1.5d
2d
|
4.2
6.3
8.3
|
4.3
|
5.18-5.68
|
4.5
7.2
9.7
|
|
10-32
|
1d
1.5d
2d
|
4.83
7.24
9.6
|
5.0
|
5.99-6.50
|
4.1
6.9
10
|
|
1/4"-28
|
1d
1.5d
2d
|
6.35
9.5
12.7
|
6.6
|
7.77-8.28
|
5.0
8.6
11.8
|
|
5/16"-24
|
1d
1.5d
2d
|
7.9
11.9
15.9
|
8.2
|
9.65-10.16
|
5.9
9.4
12.8
|
|
3/8"-24
|
1d
1.5d
2d
|
9.5
14.3
19.1
|
9.8
|
11.37-11.88
|
7.3
11.5
15.6
|
|
7/16"-20
|
1d
1.5d
2d
|
11.1
16.7
22.2
|
11.4
|
13.3-13.7
|
7.0
11.1
15.0
|
|
1/2"-20
|
1d
1.5d
2d
|
12.7
19.1
25.4
|
13.0
|
15.03-15.67
|
7.9
12.8
17.3
|
|
9/16"-18
|
1d
1.5d
2d
|
14.3
21.5
28.6
|
14.6
|
16.91-17.55
|
7.9
12.0
16.0
|
|
5/8"-18
|
1d
1.5d
2d
|
15.9
23.8
31.8
|
16.2
|
18.61-19.25
|
9.4
14.5
19.7
|
|
3/4"-16
|
1d
1.5d
2d
|
19.1
28.6
31.8
|
19.4
|
22.25-22.88
|
10.1
15.6
21.0
|
|
7/8"-14
|
1d
1.5d
2d
|
22.2
33.3
44.5
|
22.6
|
25.93-26.69
|
10.3
15.9
21.6
|
|
1"-14
|
1d
1.5d
2d
|
25.4
38.1
50.8
|
25.9
|
29.69-30.45
|
11.8
18.1
24.5
|
|
1"-12
|
1d
1.5d
|
25.4
38.1
|
30.0
|
29.69-30.45
|
10.0
15.6
|
|
|
