MIL-DTL-52618/9C
Size code designators shall be in accordance with table I.
TABLE I. Size code numbers for reducing crosses.
Size code
Nominal pipe size (inch)
numbers
Port 1
Port 2
Port 3
Port 4
901
3/4
x
3/4
x
1/2
x
1/2
902
1
x
1
x
3/4
x
3/4
903
1-1/4
x
1-1/4
x
1
x
1
904
1-1/4
x
1-1/4
x
3/4
x
3/4
905
1-1/2
x
1-1/2
x
1-1/4
x
1-1/4
906
1-1/2
x
1-1/2
x
1
x
1
907
1-1/2
x
1-1/2
x
3/4
x
3/4
908
2
x
2
x
1-1/2
x
1-1/2
909
2
x
2
x
1-1/4
x
1-1/4
910
2
x
2
x
1
x
1
911
2
x
2
x
3/4
x
3/4
912
2-1/2
x
2-1/2
x
2
x
2
913
2-1/2
x
2-1/2
x
1-1/2
x
1-1/2
914
2-1/2
x
2-1/2
x
1-1/4
x
1-1/4
915
2-1/2
x
2-1/2
x
1
x
1
916
3
x
3
x
2
x
2
917
3
x
3
x
1-1/2
x
1-1/2
918
3
x
3
x
1-1/4
x
1-1/4
919
3
x
3
x
1
x
1
920
3-1/2
x
3-1/2
x
2-1/2
x
2-1/2
921
3-1/2
x
3-1/2
x
2
x
2
922
3-1/2
x
3-1/2
x
1-1/2
x
1-1/2
923
4
x
4
x
3
x
3
924
4
x
4
x
2-1/2
x
2-1/2
925
4
x
4
x
2
x
2
926
4
x
4
x
1-1/2
x
1-1/2
927
5
x
5
x
4
x
4
928
5
x
5
x
3
x
3
929
5
x
5
x
2
x
2
930
6
x
6
x
4
x
4
931
6
x
6
x
3
x
3
932
6
x
6
x
2-1/2
x
2-1/2
933
6
x
6
x
2
x
2
934
8
x
8
x
6
x
6
935
8
x
8
x
4
x
4
Pipe threads shall be in accordance with MIL-DTL-52618.
2
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