AS568-174 O-Ring

Inside diameter 8.737″
Cross-section 0.103″
Outside diameter 8.943″
Metric (ID × CS) 221.92 × 2.62 mm

OD is derived: ID + 2 × CS = 8.737″ + 2 × 0.103″ = 8.943″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -174
-172 8.237″ 8.443″ 209.22 ID −0.500″
-173 8.487″ 8.693″ 215.57 ID −0.250″
-174 8.737″ 8.943″ 221.92
-175 8.987″ 9.193″ 228.27 ID +0.250″
-176 9.237″ 9.443″ 234.62 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.