规格代码

环规代号

牙数
/in

螺距
P

环规厚
L

基距
L1

L1
偏差

基面大径
≥d0

基面中径
d2

基面小径
d1

d1
偏差

外径
D

1

1017362501

1/16 NPT

27

0.941

4.964

4.064

+0.025
0

7.904

7.142

6.591

+0.01
0

30

2

1017362502

1/8 NPT

27

0.941

5.002

4.102

+0.025
0

10.251

9.489

8.938

+0.015
0

30

3

1017362503

1/4 NPT

18

1.411

7.186

5.786

+0.025
0

13.63

12.487

11.573

+0.015
0

38

4

1017362504

3/8 NPT

18

1.411

7.496

6.096

+0.025
0

17.069

15.926

15.012

+0.015
0

38

5

1017362505

1/2 NPT

14

1.814

9.928

8.128

+0.025
0

21.242

19.772

18.564

+0.025
0

46