Specifications for sieves

This table lists the sieves to be used to assess dockage and grading factors.

Sieves for assessing dockage and grading factors
Type Sieve name Perforation size
(millimetres)
Manufacturer’s designation
(fraction of inches)
Round-hole Number 4.5 1.79 4½/64
Number 5 1.98 5/64
Number 5.5 2.18 5½/64
Number 6 2.38 6/64
Number 6.5 2.58 6½/64
Number 7 2.78 7/64
Number 7.5 2.98 7½/64
Number 8 3.18 8/64
Number 8.5 3.37 8½/64
Number 9 3.57 9/64
Number 10 3.97 10/64
Number 11 4.37 11/64
Number 12 4.76 12/64
Number 14 5.56 14/64
Number 15 5.95 15/64
Number 16 6.35 16/64
Number 17 6.75 17/64
Number 18 7.14 18/64
Number 20 7.94 20/64
Number 21 8.33 21/64
Number 22 8.73 22/64
Number 24 9.52 24/64
Round-hole Metric Number 8.0 mm 8.0 not applicable
Number 9.0 mm 9.0 not applicable
Number 10.0 mm 10.0 not applicable
Slotted Number 4.5 1.79 x 12.70 4½/64 x 1/2
Number 5 1.98 x 19.05 5/64 x 3/4
Number 6 2.38 x 19.05 6/64 x 3/4
Number 8 3.18 x 19.05 8/64 x 3/4
Number 9 3.57 x 19.05 9/64 x 3/4
Number 11 4.37 x 19.05 11/64 x 3/4
Number 12 4.76 x 19.05 12/16 x 3/4
Number 0.028 0.71 x 11.90 0.028 x 15/32
Number 0.032 0.81 x 11.90 0.032 x 15/32
Number 0.035 0.89 x 11.90 0.035 x 15/32
Number 0.038 0.96 x 11.90 0.038 x 15/32
Number 0.040 1.02 x 11.90 0.040 x 15/32
Buckwheat Number 5 triangle with 1.98 mm inscribed circle triangle with 0.078 inch inscribed circle
Number 6 triangle with 2.26 mm inscribed circle triangle with 0.089 inch inscribed circle
Wire Number 3 x 16 3 x 16 mesh per 25.4 mm 3 x 16 wire mesh per inch
Number 4 x 14 4 x 14 mesh per 25.4 mm 4 x 14 wire mesh per inch
Number 10 x 10 10 x 10 mesh per 25.4 mm 10 x 10 wire mesh per inch
Number 9 x 9 9 x 9 mesh per 25.4 mm 9 x 9 wire mesh per inch
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