文档介绍：管螺纹外螺纹大径内螺纹小径
R1/8"-28
R1/4"-19
R3/8"-19
R1/2"-14
(R5/8"-14)
R3/4"-14
R1"-11
"-11
"-11
"-11
R2"-11
管螺纹外螺纹大径内螺纹小径
G1/8"-28
G1/4"-19
G3/8"-19
G1/2"-14
(G5/8"-14)
G3/4"-14
G1"-11
"-11
"-11
"-11
G2"-11
管螺纹外径内径
Z1/8"-27
Z1/4"-18
Z3/8"-18
Z1/2"-14
Z3/4"-14
Z1"-
"-
"-
Z2"-
UNF
管螺纹外径内径
7/16"-20
1/2"-20
9/16"-18
3/4"-16
7/8"-14
"-12
"-12
"-12
SAE 45°
管螺纹外径内径
3/8"-24
7/16"-20
1/2"-20
5/8"-18
3/4"-16
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"
28
G 1/4
1/4"
19
G 3/8
3/8"
19
15
G 1/2
1/2"
14
19
G 5/8
5/8"
14
G 3/4
3/4"
14
G 7/8
7/8"
14
28
G 1
1"
11
G 1 1/8
1 1/8"
11
35
G 1 1/4
1 1/4"
11
G 1 3/8
1 3/8"
11
G 1 1/