AS568-013 O-Ring

Inside diameter 0.426″
Cross-section 0.070″
Outside diameter 0.566″
Metric (ID × CS) 10.82 × 1.78 mm

OD is derived: ID + 2 × CS = 0.426″ + 2 × 0.070″ = 0.566″.

Neighboring sizes (CS 0.070″ series)

Dash ID OD ID mm vs -013
-011 0.301″ 0.441″ 7.65 ID −0.125″
-012 0.364″ 0.504″ 9.25 ID −0.062″
-013 0.426″ 0.566″ 10.82
-014 0.489″ 0.629″ 12.42 ID +0.063″
-015 0.551″ 0.691″ 14.00 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.