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SPECIALISTS IN SILICONE RUBBER SINCE 1952
www.siliconerubber.com           info@siliconerubber.com
RMA TOLERANCES FOR MOLDED PRODUCTS

Drawing Designation  "A1" High Precision
Size
(Millimeters)

Fixed

 Closure   Size (Inches) Fixed

Closure
Above Incl.
0 10
10 16
16 25
25 40
40 63
63 100
100 160
 
± .10
± .13
± .16
± .20
± .25
± .32
± .40
 
± .13
± .16
± .20
± .25
± .32
± .40
± .50
 
Above Incl.
0 .40
.40 .63
.63 1.00
1.00 1.60
1.60 2.50
2.50 4.00
4.00 6.30
 
± .004
± .005
± .006
± .008
± .010
± .013
± .016
 
± .005
± .006
± .008
± .010
± .013
± .016
± .020

Drawing Designation  "A2" Precision

Size
(Millimeters)

Fixed

 Closure   Size (Inches) Fixed

Closure
Above Incl.
0 10
10 16
16 25
25 40
40 63
63 100
100 160
160 & over multiply by
 
± .16
± .20
± .25
± .32
± .40
± .50
± .63
.004
 
± .20
± .25
± .32
± .40
± .50
± .63
± .80
.005
 
Above Incl.
0 .40
.40 .63
.63 1.00
1.00 1.60
1.60 2.50
2.50 4.00
4.00 6.30
6.30 & over multiply by
 
± .006
± .008
± .010
± .013
± .016
± .020
± .025
.004
 
± .008
± .010
± .013
± .016
± .020
± .025
± .032
 .005

Drawing Designation  "A3" Commercial
Size
 (Millimeters)

Fixed

 Closure   Size (Inches) Fixed

Closure
Above Incl.
0 10
10 16
16 25
25 40
40 63
63 100
100 160
160 & over multiply by
 
± .20
± .25
± .32
± .40
± .50
± .63
± .80
.005
 
± .32
± .40
± .50
± .63
± .80
± 1.00
± 1.25
.008
 
Above Incl.
0 .40
.40 .63
.63 1.00
1.00 1.60
1.60 2.50
2.50 4.00
4.00 6.30
6.30 & over multiply by
 
± .008
± .010
± .013
± .016
± .020
± .025
± .032
.005
 
± .013
± .016
± .020
± .025
± .032
± .040
± .050
 .008

Drawing Designation  "A4" Basic

Size

(Millimeters)

Fixed

 Closure   Size (Inches) Fixed

Closure
Above Incl.
0 10
10 16
16 25
25 40
40 63
63 100
100 160
160 & over multiply by
 
± .32
± .40
± .50
± .63
± .80
± 1.00
± 1.25
.008
 
± .80
± .90
± 1.00
± 1.12
± 1.25
± 1.40
± 1.60
.010
 
Above Incl.
0 .40
.40 .63
.63 1.00
1.00 1.60
1.60 2.50
2.50 4.00
4.00 6.30
6.30 & over multiply by
 
± .013
± .016
± .020
± .025
± .032
± .040
± .050
.008
 
± .032
± .036
± .040
± .045
± .050
± .056
± .063
 .010
Silicone Rubber Right Products, LLC
112 West Lake Street, Northlake, IL 60164       Phone: (708) 531-1717     Fax: (708) 531-1719