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 |