AS568-425 O-Ring

Inside diameter 4.475″
Cross-section 0.275″
Outside diameter 5.025″
Metric (ID × CS) 113.66 × 6.99 mm

OD is derived: ID + 2 × CS = 4.475″ + 2 × 0.275″ = 5.025″.

Neighboring sizes (CS 0.275″ series)

Dash ID OD ID mm vs -425
-425 4.475″ 5.025″ 113.66
-426 4.600″ 5.150″ 116.84 ID +0.125″
-427 4.725″ 5.275″ 120.01 ID +0.250″

Same ID, other cross-sections

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.