AS568-153 O-Ring

Inside diameter 3.487″
Cross-section 0.103″
Outside diameter 3.693″
Metric (ID × CS) 88.57 × 2.62 mm

OD is derived: ID + 2 × CS = 3.487″ + 2 × 0.103″ = 3.693″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -153
-151 2.987″ 3.193″ 75.87 ID −0.500″
-152 3.237″ 3.443″ 82.22 ID −0.250″
-153 3.487″ 3.693″ 88.57
-154 3.737″ 3.943″ 94.92 ID +0.250″
-155 3.987″ 4.193″ 101.27 ID +0.500″
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.