AS568-008 O-Ring

Inside diameter 0.176″
Cross-section 0.070″
Outside diameter 0.316″
Metric (ID × CS) 4.47 × 1.78 mm

OD is derived: ID + 2 × CS = 0.176″ + 2 × 0.070″ = 0.316″.

Neighboring sizes (CS 0.070″ series)

Dash ID OD ID mm vs -008
-006 0.114″ 0.254″ 2.90 ID −0.062″
-007 0.145″ 0.285″ 3.68 ID −0.031″
-008 0.176″ 0.316″ 4.47
-009 0.208″ 0.348″ 5.28 ID +0.032″
-010 0.239″ 0.379″ 6.07 ID +0.063″
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.