MIL-DTL-52618/2E
Configuration designators shall be in accordance with table I.
TABLE I. Configuration code letter for fittings, (see figure A).
Configuration code
Description
F
Reducers
G
Close pattern return bend
H
Open pattern return bend
Size code numbers for reducers shall be in accordance with table II.
TABLE II. Size code numbers for reducers.
Nominal pipe size
(inch) X (inch)
Size code
numbers
Port
Port
1
2
24
1/2
X
3/8
25
1/2
X
1/4
26
3/4
X
1/2
27
3/4
X
3/8
28
3/4
X
1/4
29
1
X
3/4
30
1
X
1/2
31
1-
X
1
32
1-
X
3/4
33
1-
X
1-1/4
34
1-
X
1
35
1-
X
3/4
36
2
X
1-1/2
37
2
X
1-1/4
38
2
X
1
39
2-
X
2
40
3
X
2-1/2
41
3
X
2
42
4
X
3
Size code numbers for return bends shall be in accordance with table III.
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