MIL-DTL-52525/4D
Maximum operating pressure shall be as specified in table II.
TABLE II. Maximum operating pressures of fittings. 1/ 2/
Steel, CRES,
titanium, nickel-
Aluminum
copper alloy,
and high-
chromium nickel
psi
MPa
psi
MPa
4500
31
3000
21
4000
27.5
3000
21
4000
27.5
3000
21
4000
27.5
3000
21
3000
21
3000
21
3000
21
3000
21
2500
17
1500
10.5
2000
14
1000
7
1500
10.5
1000
7
1125
8
600
4
1/ Dimensions are in inches.
2/ Metric equivalents are given for information only.
Over tightening torque shall be as specified in table III.
TABLE III. Over-tightening torque for swivel nut. 1/ 2/
Torque values for
steel, CRES,
Torque values
titanium, nickel-
for aluminum
copper alloy, and
high-chromium
SAE dash
Hose ID ref
nickel
size
inches (mm)
Pound-
Pound-force
force
Nm
Inches
Nm
Inches
(lb-in)
(lb-in)
-4
.250 (6.35)
135
15
140
16
-5
.313 (7.95)
230
26
180
20
-6
.375 (9.53)
276
31
195
22
-8
.500 (12.70)
450
51
350
40
-10
.625 (15.88)
735
83
430
49
-12
.750 (19.05)
900
102
550
62
-16
1.000 (25.40)
1200
136
840
95
1/ Dimensions are in inches.
2/ Metric equivalents are given for information only.
5
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