AS568-323 O-Ring

Inside diameter 1.287″
Cross-section 0.210″
Outside diameter 1.707″
Metric (ID × CS) 32.69 × 5.33 mm

OD is derived: ID + 2 × CS = 1.287″ + 2 × 0.210″ = 1.707″.

Neighboring sizes (CS 0.210″ series)

Dash ID OD ID mm vs -323
-321 1.162″ 1.582″ 29.51 ID −0.125″
-322 1.225″ 1.645″ 31.12 ID −0.062″
-323 1.287″ 1.707″ 32.69
-324 1.350″ 1.770″ 34.29 ID +0.063″
-325 1.475″ 1.895″ 37.47 ID +0.188″
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.