R 2 2"
59.614 2.309
11
58.135
56.656 1.479 0.317
56
R 2
1/2
2 1/2"
75.184 2.309
11
73.705
72.226 1.479 0.317
71
R 3 3"
87.884 2.309
11
86.405
84.926 1.479 0.317
85.5
R 4 4"
113.030 2.309
11
111.551 110.072 1.479 0.317
110.5
R 5 5"
138.430 2.309
11
136.951 135.472 1.479 0.317
136
R 6 6"
163.830 2.309
11
162.351 160.872 1.479 0.317
161.5
管螺纹尺寸表
55°圆柱管螺纹的型式和尺寸
British Pipe Thread (惠氏管螺纹) -- 圆柱 (BSPP/BSPF)
螺纹代号 基本尺寸
大径
mm
d=D
螺距
mm
p
每英寸牙
数
tpi
中径
mm
d2=D2
小径
外螺纹
d3
牙型高度
H1
底孔尺寸
mm
G 1/8
1/8"
9.728
0.907
28
9.147
8.566
0.581
8.7
G 1/4
1/4"
13.157
1.337
19
12.301 11.445
0.856
11.6
G 3/8
3/8"
16.662
1.337
19
15.806 14.95
0.856
15
G 1/2
1/2"
20.955
1.814
14
19.793 18.631
1.162
19
G 5/8
5/8"
22.911
1.814
14
21.749 20.587
1.162
20.75
G 3/4
3/4"
26.441
1.814
14
25.279 24.117
1.162
24.5
G 7/8
7/8"
30.201
1.814
14
29.039 27.877
1.162
28