MIL-DTL-85052/2C
Cushion. None
CUSHION REQUIREMENTS:
1. Physical properties. Physical properties of cushion shall be as specified in table II. Unless
o
otherwise specified, results are an average of 5 specimens and tolerance on temperature + 5 F.
2. Compression set: - See MIL-DTL-85052.
- Air age at 212 °F.
- Not to exceed 30 percent average of 3 specimens.
3. Flammability:
- See MIL-DTL-85052.
- Specimens standard ASTM test lab.
- Horizontal burn test.
TABLE II. Physical properties.
Allowable change from actual
original properties after:
Test
Required
Test
Immersion Hydraulic Heat Aging
Original
Method
Fluid (Skydrol)-
70 hrs at
o
Properties
500B, 22 hrs at
+ 275 F
o
+ 275 F 1/
Hardness
durometer "A" ASTM-D2240
65-75
- 20 Max
+ 10 Max
Tensile
strength
ASTM-D412
2000 Min
- 50 % Max
- 20 % Max
(PSI)
Elongation
ASTM-D412
400 Min
- 25 % Max
- 40 % Max
(%)
Tear strength
ASTM-D624
200 Min
- 40 % Max
- 40 % Max
(PPI)
DIE "B"
Specific
ASTM-D297
Report
-
+2%
gravity
Volume
ASTM-D471
-
+ 30 % Max
- 10 % Max
change (%)
1/. Unless otherwise specified, property measurements shall be performed immediately after
removal from the immersion bath.
PART NUMBER:
Part numbers shall consist of the following (in sequence).
4
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