AS568-015 O-Ring

Inside diameter 0.551″
Cross-section 0.070″
Outside diameter 0.691″
Metric (ID × CS) 14.00 × 1.78 mm

OD is derived: ID + 2 × CS = 0.551″ + 2 × 0.070″ = 0.691″.

Neighboring sizes (CS 0.070″ series)

Dash ID OD ID mm vs -015
-013 0.426″ 0.566″ 10.82 ID −0.125″
-014 0.489″ 0.629″ 12.42 ID −0.062″
-015 0.551″ 0.691″ 14.00
-016 0.614″ 0.754″ 15.60 ID +0.063″
-017 0.676″ 0.816″ 17.17 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.