Rubber Manufacturers Association A1 Tolerance (High Precision)
Rubber Manufacturers Association A2 Tolerance (Precision)
Rubber Manufacturers Association A3 Tolerance (Commercial)
Rubber Manufacturers Association A4 Tolerance (Non Critical)
A1 (mm)
A1 (inch)
Sizeømm÷
Tolerance
Sizeøinch÷
Tolerance
Above
Incl
Fixed
closure
Above
Incl
Fixed
closure
-
10
±0.10
±0.13
-
0.400
±0.004
±0.005
10
16
±0.13
±0.16
0.400
0.630
±0.005
±0.006
16
25
±0.16
±0.20
0.630
1.000
±0.006
±0.008
25
40
±0.20
±0.25
1.000
1.600
±0.008
±0.010
40
63
±0.25
±0.32
1.600
2.500
±0.010
±0.013
63
100
±0.32
±0.40
2.500
4.000
±0.013
±0.016
100
>160
±0.40
±0.50
4.000
6.300
±0.016
±0.020
A2 (mm)
A2 (inch)
Sizeømm÷
Tolerance
Sizeøinch÷
Tolerance
Above
Incl
Fixed
closure
Above
Incl
Fixed
closure
-
10
±0.16
±0.20
-
0.100
±0.006
±0.008
10
16
±0.20
±0.25
0.100
0.630
±0.008
±0.010
16
25
±0.25
±0.32
0.630
1.000
±0.010
±0.013
25
40
±0.32
±0.40
1.000
1.600
±0.013
±0.016
40
63
±0.40
±0.50
1.600
2.500
±0.016
±0.020
63
100
±0.50
±0.63
2.500
4.000
±0.020
±0.025
100
160
±0.63
±0.80
4.000
6.300
±0.025
±0.032
160
>160
trim size×0.004
trim size×0.005
6.300
>6.300
trim size×0.004
trim size×0.005
A3 (mm)
A3 (inch)
Sizeømm÷
Tolerance
Sizeøinch÷
Tolerance
Above
Incl
Fixed
closure
Above
Incl
Fixed
closure
-
10
±0.20
±0.32
-
0.400
±0.008
±0.013
10
16
±0.25
±0.40
0.400
0.630
±0.010
±0.016
16
25
±0.32
±0.50
0.630
1.000
±0.013
±0.020
25
40
±0.40
±0.63
1.000
1.600
±0.016
±0.025
40
63
±0.50
±0.80
1.600
2.500
±0.020
±0.032
63
100
±0.63
±1.00
2.500
4.000
±0.025
±0.040
100
160
±0.80
±1.25
4.000
6.300
±0.032
±0.050
160
>160
trim size×0.005
trim size×0.008
6.300
>6.300
trim size×0.005
trim size×0.008
A4 (mm)
A4 (inch)
Sizeømm÷
Tolerance
Sizeøinch÷
Tolerance
Above
Incl
Fixed
closure
Above
Incl
Fixed
closure
-
10
±0.32
±0.82
-
0.400
±0.013
±0.032
10
16
±0.40
±0.90
0.400
0.630
±0.016
±0.036
16
25
±0.50
±1.00
0.630
1.000
±0.020
±0.040
25
40
±0.63
±1.12
1.000
1.600
±0.025
±0.045
40
63
±0.80
±1.25
1.600
2.500
±0.032
±0.050
63
100
±1.00
±1.40
2.500
4.000
±0.040
±0.056
100
160
±1.25
±1.60
4.000
6.300
±0.050
±0.063
160
>160
trim size×0.008
trim size×0.010
6.300
>6.300
trim size×0.008
trim size×0.010
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