AS568-124 O-Ring

Inside diameter 1.237″
Cross-section 0.103″
Outside diameter 1.443″
Metric (ID × CS) 31.42 × 2.62 mm

OD is derived: ID + 2 × CS = 1.237″ + 2 × 0.103″ = 1.443″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -124
-122 1.112″ 1.318″ 28.24 ID −0.125″
-123 1.174″ 1.380″ 29.82 ID −0.063″
-124 1.237″ 1.443″ 31.42
-125 1.299″ 1.505″ 32.99 ID +0.062″
-126 1.362″ 1.568″ 34.59 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.