AS568-136 O-Ring

Inside diameter 1.987″
Cross-section 0.103″
Outside diameter 2.193″
Metric (ID × CS) 50.47 × 2.62 mm

OD is derived: ID + 2 × CS = 1.987″ + 2 × 0.103″ = 2.193″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -136
-134 1.862″ 2.068″ 47.29 ID −0.125″
-135 1.925″ 2.131″ 48.89 ID −0.062″
-136 1.987″ 2.193″ 50.47
-137 2.050″ 2.256″ 52.07 ID +0.063″
-138 2.112″ 2.318″ 53.64 ID +0.125″
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.