AS568-475 O-Ring

Inside diameter 25.940″
Cross-section 0.275″
Outside diameter 26.490″
Metric (ID × CS) 658.88 × 6.99 mm

OD is derived: ID + 2 × CS = 25.940″ + 2 × 0.275″ = 26.490″.

Neighboring sizes (CS 0.275″ series)

Dash ID OD ID mm vs -475
-473 23.940″ 24.490″ 608.08 ID −2.000″
-474 24.940″ 25.490″ 633.48 ID −1.000″
-475 25.940″ 26.490″ 658.88

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.