AS568-019 O-Ring

Inside diameter 0.801″
Cross-section 0.070″
Outside diameter 0.941″
Metric (ID × CS) 20.35 × 1.78 mm

OD is derived: ID + 2 × CS = 0.801″ + 2 × 0.070″ = 0.941″.

Neighboring sizes (CS 0.070″ series)

Dash ID OD ID mm vs -019
-017 0.676″ 0.816″ 17.17 ID −0.125″
-018 0.739″ 0.879″ 18.77 ID −0.062″
-019 0.801″ 0.941″ 20.35
-020 0.864″ 1.004″ 21.95 ID +0.063″
-021 0.926″ 1.066″ 23.52 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.