MIL-DTL-85052/3C
Table II. Physical properties - Continued.
Allowable change from actual original
Required
properties after:
Test
Original
Test
Heat aging Oil immersion in
Method
Properties
70 hrs at
MIL-PRF-7808
DIP test
o
o
1/
500 F
70 hrs at + 302 F
Volume
ASTM-D471
-
-
+ 45 % Max
+ 5%
change (%)
Max
Weight
ASTM-D471
Report
-5% Max
-
-
change (%)
Specific
ASTM-D471
Report
-
-
-
gravity
1/ DIP test: Test sample shall be dipped in ASTM-D235, type I solvent and allowed to dry at
room temperature for 24 hrs. This procedure shall be repeated 10 times.
2/ Test shall be conducted in accordance with ASTM-D412 on the fabric reinforced cushion test
specimen. Except as noted herein, DIE "A" dumbbell specimens shall be cut from the actual
o
cushion with the fabric weave at 45 to the direction of pull and with the ears folded out to
flatten the specimen. The rate of separation of the jaws shall be 12 inches per minute. The
tensile strength and percent location shall be measured when the fabric reinforced material
begins to separate from the elastomer or the specimen breaks completely. Tensile strength shall
be based on overall thickness of rubber and fabric reinforcing material. Specimen failure due to
fabric separation at the test fixture jaws shall be discarded and another sample tested.
PART NUMBER:
Part number shall consist of the following (in sequence).
1.
The letter M.
2.
The general specification number.
3.
A slash and a slash number of this specification sheet.
4.
A dash and the appropriate size dash number from table I.
Example: M85052/3-8
INTENDED USE:
These clamps are intended for use as follows:
o
Temperature range: - 65 to + 500 F. These clamps have cushions, which have been
compounded for high temperature capability at the sacrifice of fluid resistance. It is
o
o
recommended for use only in those areas with operating temperatures from 275 F to 500 F
o
where fluid exposure is minimal. For application below 275 F, the use of clamps with a higher
5
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