MIL-DTL-52525/7D
Maximum operating pressure shall be as specified in table II.
TABLE II. Maximum operating pressures of fittings. 1/ 2/
Steel, CRES, titanium,
nickel-copper alloy,
SAE
Aluminum
Hose ID
and high-chromium
dash
inches (mm)
nickel
size
psi
MPa
psi
MPa
-4
.250 (6.35)
4500
31
3000
21
-5
.313 (7.95)
4000
27.5
3000
21
-6
.375 (9.53)
4000
27.5
3000
21
-8
.500 (12.70)
4000
27.5
3000
21
-10
.625 (15.88)
3000
21
3000
21
-12
.750 (19.05)
3000
21
3000
21
-16
1.000 (25.40)
2500
17
1500
10.5
-20
1.250 (31.75)
2000
14
1000
7
-24
1.500 (38.10)
1500
10.5
1000
7
-32
2.000 (50.80)
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, titanium, nickel-
Torque values
copper alloy, and high-
for aluminum
SAE
chromium nickel
Hose ID ref
dash
inches (mm)
Pound-
Pound-
size
force
force
Nm
Nm
Inches
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
-20
1.250 (31.75)
1900
215
1020
115
-24
1.500 (38.10)
2700
305
1080
122
-32
2.000 (50.80)
4000
452
2000
226
1/ Dimensions are in inches.
2/ Metric equivalents are given for information only.
5
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