AS568-165 O-Ring

Inside diameter 6.487″
Cross-section 0.103″
Outside diameter 6.693″
Metric (ID × CS) 164.77 × 2.62 mm

OD is derived: ID + 2 × CS = 6.487″ + 2 × 0.103″ = 6.693″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -165
-163 5.987″ 6.193″ 152.07 ID −0.500″
-164 6.237″ 6.443″ 158.42 ID −0.250″
-165 6.487″ 6.693″ 164.77
-166 6.737″ 6.943″ 171.12 ID +0.250″
-167 6.987″ 7.193″ 177.47 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.