AS568-123 O-Ring

Inside diameter 1.174″
Cross-section 0.103″
Outside diameter 1.380″
Metric (ID × CS) 29.82 × 2.62 mm

OD is derived: ID + 2 × CS = 1.174″ + 2 × 0.103″ = 1.380″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -123
-121 1.049″ 1.255″ 26.64 ID −0.125″
-122 1.112″ 1.318″ 28.24 ID −0.062″
-123 1.174″ 1.380″ 29.82
-124 1.237″ 1.443″ 31.42 ID +0.063″
-125 1.299″ 1.505″ 32.99 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.