Tolerances for sieves.

The maintenance tolerances for sieves used in performing official inspection services shall be: (a) Thickness of metal: ±0.0015 inch. (b) Accuracy of perforation: ±0.001 inch from design specification. (c) Sieving accuracy: Sieve description Tolerance Direct comparison Sample exchange .064 × 3 ⁄ 8 inch oblong ±0.2 percent, mean deviation from standard sieve using wheat ±0.3 percent, mean deviation from standard sieve using wheat 5 ⁄ 64 × 3 ⁄ 4 inch slotted ±0.3 percent, mean deviation from standard sieve using barley ±0.5 percent, mean deviation from standard sieve using barley 5 5 ⁄ 64 × 3 ⁄ 4 inch slotted ±0.5 percent, mean deviation from standard sieve using barley ±0.7 percent, mean deviation from standard sieve using barley 6 ⁄ 64 × 3 ⁄ 4 inch slotted ±0.7 percent, mean deviation from standard sieve using barley ±1.0 percent, mean deviation from standard sieve using barley