AS568-322 O-Ring

Inside diameter 1.225″
Cross-section 0.210″
Outside diameter 1.645″
Metric (ID × CS) 31.12 × 5.33 mm

OD is derived: ID + 2 × CS = 1.225″ + 2 × 0.210″ = 1.645″.

Neighboring sizes (CS 0.210″ series)

Dash ID OD ID mm vs -322
-320 1.100″ 1.520″ 27.94 ID −0.125″
-321 1.162″ 1.582″ 29.51 ID −0.063″
-322 1.225″ 1.645″ 31.12
-323 1.287″ 1.707″ 32.69 ID +0.062″
-324 1.350″ 1.770″ 34.29 ID +0.125″
Data provenance. SAE AS568, Aerospace Size Standard for O-rings (SAE International). Nominal dimensions per AS568; size tolerances vary by dash number and are not yet cataloged. Groove/gland design depends on the application — consult a gland design reference. See all data sources.