About this tool
The table covers the full SAE AS568 range (dash 001 through 475) — 349 published sizes plus filled gaps for completeness. Inch values are the source of truth; metric values are computed × 25.4 and rounded to 0.01 mm.
Sources: SAE AS568D, Parker O-Ring Handbook ORD 5700 § 5.1, cross-checked against Trelleborg, Apple Rubber, and Eriks catalogues.