U.S. Code of Federal Regulations

Regulations most recently checked for updates: Mar 29, 2020

§ 801.8 - 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