MIL-DTL-85052/1C
CUSHION REQUIREMENTS:
1. Physical properties. Physical properties shall be as specified in table II. Unless otherwise
o
specified, results are an average of 5 specimens and tolerance on temperature + 5 F.
2. Ozone resistance. Required per MIL-DTL-85052.
3. Compression set. See MIL-DTL-85052.
- Air age at 212 °F.
- Not to exceed 55 percent average of 3 specimens.
4. Flammability. See MIL-DTL-85052.
- Specimens -16 size clamp assemblies unbent until flat.
- Vertical burn test.
Table II. Physical properties.
Allowable change from actual original
properties after:
Test
Test
Required Fuel Immersion
Hydraulic Fluid
Heat
Method
Original
MIL-DTL-5624, Immersion
Aging
Properties JP-4, 163 hrs at
MIL-PRF-5606
70 hrs at
o
o
o
70 hrs at +156 F +275 F
+100 F 1/
1/
ASTM-D2240
Hardness
65-75
- 20 Max
- 15 Max
+ 10 Max
durometer
"A"
ASTM-D412 2000 Min
- 30 % Max
- 10 % Max
- 40%
Tensile
Max
strength
(PSI)
Elongation
ASTM-D412
500 Min
- 10 % Max
- 10 % Max
- 75%
(%)
Max
Tear
ASTM-D624
300 Min
- 35 % Max
- 10 % Max
- 40%
strength
DIE "B"
Max
(PPI)
Specific
-
As
-
-
+ 2%
gravity
measured
Volume
ASTM-D471
change (%)
1.After
-10 %
+10% Max
+15% Max
-
-
conditioning
Max
2. After 24
-
+10% Max
+10% Max
-
-
hrs air dry
1/ Unless otherwise specified, property measurements shall be performed immediately after
removal from immersion bath.
4
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