AS568-171 O-Ring

Inside diameter 7.987″
Cross-section 0.103″
Outside diameter 8.193″
Metric (ID × CS) 202.87 × 2.62 mm

OD is derived: ID + 2 × CS = 7.987″ + 2 × 0.103″ = 8.193″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -171
-169 7.487″ 7.693″ 190.17 ID −0.500″
-170 7.737″ 7.943″ 196.52 ID −0.250″
-171 7.987″ 8.193″ 202.87
-172 8.237″ 8.443″ 209.22 ID +0.250″
-173 8.487″ 8.693″ 215.57 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.