AS568-103 O-Ring

Inside diameter 0.081″
Cross-section 0.103″
Outside diameter 0.287″
Metric (ID × CS) 2.06 × 2.62 mm

OD is derived: ID + 2 × CS = 0.081″ + 2 × 0.103″ = 0.287″.

Neighboring sizes (CS 0.103″ series)

Dash ID OD ID mm vs -103
-102 0.049″ 0.255″ 1.24 ID −0.032″
-103 0.081″ 0.287″ 2.06
-104 0.112″ 0.318″ 2.84 ID +0.031″
-105 0.143″ 0.349″ 3.63 ID +0.062″
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.