Openings Tolerances for USA Industrial Perforated Plate/Screens

Tolerances on openings in USA standard specifications for industrial perforated plate and screens shall be in accordance with those listed in Table 1.

Table 1: Tolerances on Openings of USA Standard Specifications for Industrial Perforated Plate and Screens
Perforated Opening			Tolerance on Openings
Standard (mm)	USA Industrial Standard (in.)	Additional Sizes (in.)	Standard (mm)	USA Industrial Standard (in.)
125.0	5	...	±2.5	±0.100
...	...	4-1/2	...	±0.090
106.0	4-1/4	...	±2.1	±0.085
100.0	4	...	±2.0	±0.080
...	...	3-3/4	...	±0.075
90.0	3-1/2	...	±1.8	±0.070
...	...	3-1/4	...	±0.065
75.0	3	...	±1.5	±0.060
...	...	2-3/4	...	±0.055
63.0	2-1/2	...	±1.3	±0.050
...	...	2-1/4	...	±0.045
53.0	2-1/8	...	±1.1	±0.043
50.0	2	...	±1.0	±0.040
...	...	1-7/8	...	±0.038
45.0	1-3/4	...	±0.9	±0.035
...	...	1-5/8	...	±0.033
37.5	1-1/2	...	±0.8	±0.030
...	...	1-3/8	...	±0.028
31.5	1-1/4	...	±0.6	±0.025
...	...	1-3/16	...	±0.024
...	...	1-1/8	...	±0.023
26.5	1-1/16	...	±0.5	±0.021
25.0	1	...	±0.5	±0.020
...	...	15/16	...	±0.019
22.4	7/8	...	±0.46	±0.018
...	...	13/16	...	±0.016
19.0	3/4	...	±0.38	±0.015
...	...	11/16	...	±0.014
16.0	5/8	...	±0.32	±0.013
...	...	9/16	...	±0.012
13.2	17/32	...	±0.30	±0.012
12.5	1/2	...	±0.28	±0.011
...	...	15/32	...	±0.011
11.2	7/16	...	±0.28	±0.011
9.5	3/8	...	±0.28	±0.010
8.0	5/16	...	±0.26	±0.010
6.7	17/64	...	±0.25	±0.009
6.3	1/4	...	±0.25	±0.009
5.6	7/32	...	±0.24	±0.009
4.75	3/16	...	±0.21	±0.008
4.00	5/32	...	±0.19	±0.007
3.35	1/8	...	±0.17	±0.006

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