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Appendix
Appendix
Installation & Maintenance
Assemblies
Equipment & Accessories
Fittings
Hoses
Fitting Identification
Fitting Standards
Male
Female
NPSM
Identification
National Pipe Straight Mechanical. Straight thread.
Seal
Both male and female have a straight thread and
30-
degree seat and chamfer. The seal takes place by
compression of the 30-degree seat on the chamfer. The
threads hold the connection mechanically.
Application
Used in fluid power systems.
Thread Identification Table
NPTF/NPSF/NPSM
SAE Thread Types
Dash Size Nominal
Size
Thread
Size
Female
Thread ID
Male
Thread OD
in.
in.
in.
-2
1/8
1/8 - 27
23/64
13/32
-4
1/4
1/4 - 18
15/32
35/64
-6
3/8
3/8 - 18
19/32
43/64
-8
1/2
1/2 - 14
3/4
27/32
-12
3/4
3/4 - 14
61/64
1
h
-16
1
1 - 11
f
1
6
1
j
-20
1
e
1
e
- 11
f
1
x
1
:
-24
1
f
1
f
- 11
f
1
1
1
3
-32
2
2 - 11
f
2
e
2
b
Male
Female
JIC 37° Flare (SAE J514)
Identification
Straight threads. Both male and female have 37-degree
seat.
Seal
The seal is made on the 37-degree flare seat. The
threads hold the connection mechanically. Only connect
male SAE 37 with female SAE 37.
Application
SAE specifies use with high-pressure hydraulic tubing.
Thread Identification Table
JIC 37° Flare
Dash Size
Nominal
Size
Thread Size
Female
Thread ID
Male
Thread OD
in.
in.
in.
-2
1/8 5/16-24
17/64
5/16
-3
3/16 3/8-24
21/64
3/8
-4
1/4
7/16-20
25/64
7/16
-5
5/16 1/2-20
29/64
1/2
-6
3/8 9/16-18
1/2
9/16
-8
1/2 3/4-16
11/16 3/4
-10
5/8 7/8-14
13/16 7/8
-12
3/4 1
h
-12
31/32 1
h
-14
7/8 1
i
-12
1
5
1
i
-16
1
1
j
-12
1
7
1
j
-20
1
e
1
c
-12
1
9
1
c
-24
1
f
1
d
-12
1
;
1
d
-32
2
2
f
-12
2
8
2
f