AS568-028 O-Ring

Inside diameter 1.364″
Cross-section 0.070″
Outside diameter 1.504″
Metric (ID × CS) 34.65 × 1.78 mm

OD is derived: ID + 2 × CS = 1.364″ + 2 × 0.070″ = 1.504″.

Neighboring sizes (CS 0.070″ series)

Dash ID OD ID mm vs -028
-026 1.239″ 1.379″ 31.47 ID −0.125″
-027 1.301″ 1.441″ 33.05 ID −0.063″
-028 1.364″ 1.504″ 34.65
-029 1.489″ 1.629″ 37.82 ID +0.125″
-030 1.614″ 1.754″ 41.00 ID +0.250″
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.