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Appendix
Appendix
Installation & Maintenance
Assemblies
Equipment & Accessories
Fittings
Hoses
Fitting Identification
Fitting Standards
Male
JIS Tapered Pipe (JIS B 0203)
Identification
Both male and female have tapered threads that
conform to JIS B 0203.
Seal
The seal is made within the threads through thread
distortion. A thread sealant is recommended.
Comments
The JIS tapered pipe thread is similar to a BSPT fitting
and is fully interchangeable.
Thread Identification Table
JIS Tapered Pipe
Female
Dash Size
Nominal
Size
Thread
Size
Male
Thread OD
Female
Thread ID
in.
in.
in.
-2
1/8
1/8-28
3/8
11/32
-4
1/4
1/4-19
17/32
7/16
-6
3/8
3/8-19
21/32
19/32
-8
1/2
1/2-14
13/16
3/4
-12
3/4
3/4-14
1
p
15/16
-16
1
1-11
1
j
1
i
-20
1
e
1
e
-11
1
z
1
x
-24
1
f
1
f
-11
1
d
1
1
-32
2
2-11
2
u
2
s
Male
Japanese Komatsu
®
30
˚ Flare with Metric
Threads (JIS B 0207)
Identification
Same as JIS B 0202, but conforms to JIS B 0207 with
metric threads.
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.
Comments
Also known as the Komatsu® style, it is used extensively
on Komatsu® equipment.
Thread Identification Table
Komatsu® Style 30˚ Flare
Female
Dash Size
Nominal Size Metric
Thread Size
Male
Thread OD
Female
Thread ID
in.
mm
-6
3/8 9.5
M 18 x 1
f
18
16.5
-8
1/2 13
M 22 x 1
f
22
20.5
-10
5/8 16
M 24 x 1
f
24
22.5
-12
3/4 19
M 30 x 1
f
30
28.5
-16
1 25
M 33 x 1
f
33
31.5
-20
1
e
32
M 36 x 1
f
36
34.5
-24
1
f
38
M 42 x 1.5 42
40.5