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Appendix
Appendix
Installation & Maintenance
Assemblies
Equipment & Accessories
Fittings
Hoses
Fitting Identification
Fitting Standards
Male
4-
Bolt Split Flange
Code 61/Code 62/Caterpillar® Flange (SAE J518)
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.
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.
Application
Commonly used in fluid power systems, worldwide, and
usually in connection on pumps and motors. The fitting
is available in two pressure ratings. Code 61, Form R, PN
35/350
bar, Type I is referred to as the “standard” series
and can withstand an operating pressure of 3,000–
5,000
psi depending on size. Code 62, Form S, PN 415
bar Type II is the heavy-duty, 6,000 psi series. While the
design is the same, bolt hole spacing and flanged head
diameters are larger for the higher pressure. Code 62
fitting.
Comments
SAE J518, DIN 20066, ISO/DIS 6162 and JIS B 8363 are
interchangeable except for the bolt sizes. The -10 is not
available as an SAE standard size. Caterpillar® flanges,
which have the same flange OD as SAE Code 62, have a
thicker flange head, which is the “C” dimension in the table.
How to Measure
1.
Measure port hole diameter [nominal flange size (in.)]
using calipers.
2.
Measure the longest bolt hole spacing from center to
center, which is Dimension “B.”
3.
Or the flange OD for further identification.
Thread Identification Table
Code 61/Code 62/CAT®
Nominal
Flange Size
Code 61
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
Nominal
Flange Size
Code 62
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
Nominal
Flange Size
Caterpillar® Code 62
in.
Flange OD A
B
C
3/4
1.625 0.938
2.000
0.560
1
1.875 1.094
2.250
0.560
1
e
2.125
1.250
2.625
0.560
1
f
2.500 1.438
3.125
0.560
2
3.125
1.750
3.812
0.560