MIL-PRF-2765E
TABLE I. Tolerance in width for sheet and strip material.
Width
Tolerance
(plus or minus)
1/4 to 1/2 inch
1/32 inch
Over 1/2 to 1 inch
3/64 inch
Over 1 to 2 inches
1/16 inch
Over 2 inches
3 percent
TABLE II. Tolerance in thickness for sheet and strip material.
Thickness - inch
Tolerance - inch
(plus or minus)
Less than 1/16
0.010
1/16 to 1/8
1/64
Over 1/8 to 1/2
1/32
Over 1/2 to 1
3/64
Over 1
1/16
3.4 Physical requirements. The synthetic rubber material shall conform to the requirements specified in
Table III.
TABLE III. Physical requirements of rubber.
Initial properties
Requirement
2
Tensile strength, 1b/in minimum
1000
Ultimate elongation, percent, minimum
300
Hardness, Type A durometer
35 to 55
Specific gravity, maximum
1.65
Delamination, after liquid immersion
No delamination
Properties after oven aging
Tensile strength, percent of initial, minimum
80
Ultimate elongation, percent of initial, minimum
70
Hardness, Type A durometer, maximum
60
Hot compression set, percent, maximum
40
Properties after oil-immersion
Tensile strength, 1b/in2 minimum
1000
Ultimate elongation, percent, minimum
300
Volume change, percent, maximum (no shrinkage allowed)
plus 25
Low temperature properties
Hardness Type A durometer, maximum
60
Cold compression set, before and after oil immersion
Percent, maximum, 10 seconds after release
75
Percent, maximum, 30 minutes after release
35
4
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