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Appendix
Appendix
Installation & Maintenance
Assemblies
Equipment & Accessories
Fittings
Hoses
Fitting Identification
Fitting Standards
Flange
Komatsu® Flange Fitting
Identification
The Komatsu® Flange fitting is nearly identical to the
SAE Code 61 flange fitting and fully interchangeable. As
O-ring sizes are different, an SAE O-ring must be used
when replacing the Komatsu® fitting with an SAE fitting.
Thread Identification Table
Komatsu®-Style Flange
Flange Head
Seal
The seal takes place on the O-ring, which is compressed
between the flanged head and the flat surface
surrounding the port. The threaded bolts hold the
connection mechanically.
Comments
There are two pressure ratings. Type I is similar to SAE
Code 61 and is referred to as the “standard” series. Type
II is similar to SAE Code 62 and is referred to as the
“
heavy duty” series. The design concept is the same, but
bolt diameters and flange head diameters are larger for
the Type II fitting. Both metric and inch bolts are used.
JIS B 8363 is interchangeable with both SAE J518 and
DIN 20066.
Thread Identification Table
JIS B 8363 4-Bolt Flange
Dash Size
Nominal Size
Flange OD A
B
in.
mm
-8
1/2 12.7 1.188
0.728
0.984
-10
5/8 15.9 1.345 0.728
1.102
-12
3/4 19.1 1.500 0.846
1.220
-16
1
25.4 1.750
1.122
1.496
-20
1
e
31.8 2.000 1.358
1.732
-24
1
f
38.1 2.375 1.750
2.125
-32
2
50.8 2.812
2.225
2.559
Nominal
Flange Size
Type I
in.
Flange OD A
B
C
1/2
1.188
0.688
1.500
0.265
5/8
1.345
0.265
3/4
1.500
0.875
1.875
0.265
1
1.750
1.031
2.062
0.315
1
e
2.000
1.188
2.312
0.315
1
f
2.375
1.406
2.750
0.315
2
2.812
1.688
3.062
0.375
2
f
3.312
2.000
3.500
0.375
3
4.000
2.438
4.188
0.375
3
f
4.500
2.750
4.750
0.422
4
5.000
3.062
5.125
0.442
5
6.000
3.625
6.000
0.442
Male
JIS B 8363 4 Bolt Flange
Female
Identification
The female port is an unthreaded hole surrounded with
4
bolt holes in a rectangular pattern. The male consists
of a flanged head, grooved for an O-ring, and a flange
with holes to match the port.
Nominal
Flange Size
Type II
in.
Flange OD A
B
C
1/2
1.250
0.718
1.594
0.305
3/4
1.625
0.937
2.000
0.345
1
1.875
1.093
2.250
0.375
1
e
2.125
1.250
2.625
0.405
1
f
2.500
1.437
3.125
0.495
2
3.125
1.750
3.812
0.495