MIL-DTL-52525/39B
The operating pressure shall be as specified in table II. Maximum operating pressures are for low
carbon steel fittings consult manufacturer for values on other materials.
TABLE II. Maximum operating pressures of fittings. 1/ 2/
Size
Hose ID
psi
MPa
dash
inches (mm)
number
-08
.500 (12.70) 5000
34.5
-12
.750 (19.05) 4000
27.6
-16
1.00 (25.40)
4000
27.6
1/ Dimensions are in inches.
2/ Metric equivalents are given for information only.
Over tightening torque shall be as specified in table III. Maximum over torque values are for low
carbon steel fittings consult manufacturer for values on other materials.
TABLE III. Over-tightening torque for swivel nut. 1/ 2/
Size
Tube OD
Pound force
Nm
dash
inches (mm)
foot(lbf-ft)
number
-08
.500 (12.70)
37.5
51
-12
.750 (19.05)
75
102
-16
1.00 (25.40)
100
136
1/ Dimensions are in inches.
2/ Metric equivalents are given for information only.
PIN: The PIN consists of the letter "M" the specification sheet number, a dash, a number for the hose
size a dash, a number for tube size, and a material finish designator.
52525/39
-12
-12
A
M
Material/finish designator (see table I)
Size dash number for tube (see figure 1)
Size dash number for hose (see figure 1)
Specification sheet number
M prefix
PIN example: M52525/39-12-12A, describes a 37 flare female swivel, 90 bent tube for a .750 inch
(19.05 mm) hose ID, to a .750 inch (19.05 mm) tube OD, aluminum with anodize finish.
To the users of this document, it is recommended that the use of carbon steel material with cadmium
plating be used only when the other materials and finishes specified in this document cannot meet
performance requirements.
Color identification. Color identification shall be in accordance with SAE-AS4841.
Marking shall include the manufacturer's name or trademark, size, and hose identifier 100R12.
Location of marking is optional.
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