CFR › Title 7 › Part 801 › §801.87 CFR §801.8Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkThe 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: