AS568-347 O-Ring

Inside diameter 4.225″
Cross-section 0.210″
Outside diameter 4.645″
Metric (ID × CS) 107.31 × 5.33 mm

OD is derived: ID + 2 × CS = 4.225″ + 2 × 0.210″ = 4.645″.

Neighboring sizes (CS 0.210″ series)

Dash ID OD ID mm vs -347
-345 3.975″ 4.395″ 100.97 ID −0.250″
-346 4.100″ 4.520″ 104.14 ID −0.125″
-347 4.225″ 4.645″ 107.31
-348 4.350″ 4.770″ 110.49 ID +0.125″
-349 4.475″ 4.895″ 113.66 ID +0.250″
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.