o ring standard, Standard O-ring, O-ring national standards: There are American Standard O-ring standard, Japanese standard O-ring standard, European standard O-ring standard, national standard O-ring standard. O-ring in accordance with industry standards, the following tolerance criteria: ID * diameter CS, Unit: mm.

 O-Ring Standard: ID

 Diameter ID0.05-1.79mm O-ring standard tolerance is + / -0.10

Diameter ID1.80-6.29mm O-ring standard tolerance is + / -0.13

Diameter ID6.30-10.59mm O-ring standard tolerance is + / -0.14

Diameter ID10.60-18.99mm O-ring standard tolerance is + / -0.17

Diameter ID19.00-31.49mm O-ring standard tolerance is + / -0.22

Diameter ID31.50-41.19mm O-ring standard tolerance is + / -0.30

Diameter ID41.20-51.49mm O-ring standard tolerance is + / -0.36

O-Ring Standard: CS

CS 0.00-1.79 O-ring diameter tolerance standard is + / -0.07

CS 1.80-2.64 O-ring diameter tolerance standard is + / -0.08

CS 2.65-3.54 O-ring diameter tolerance standard is + / -0.09

CS 3.55-5.29 O-ring diameter tolerance standard is + / -0.10

CS 5.30-6.99 O-ring diameter tolerance standard is + / -0.13

CS 7.00-8.00 O-ring diameter tolerance standard is + / -0.15

CS 8.01-10.00 O-ring diameter tolerance standard is + / -0.20