ISO 3601 O-Ring Standard
Also known as: ISO 3601-1 · ISO 3601-2 · metric O-ring ISO
ISO 3601 is the international metric O-ring standard defining dimensions (Part 1), groove design (Part 2), quality acceptance criteria (Part 3), and elastomer identification (Part 4).
Technical Detail
ISO 3601 is the metric equivalent of AS568 for international/European systems. Part 1 (ISO 3601-1:2012) tabulates O-ring IDs from 0.74 mm to 1000 mm with associated cross-sections (0.9 mm to 10 mm W). Part 2 (ISO 3601-2) specifies groove geometry for static and dynamic duty — groove depth, width, corner radius, surface finish. Part 3 covers acceptance quality levels (AQL 1.0 to 4.0) and inspection. Part 4 identifies elastomers by colour coding. ISO 3601 sizes overlap with JIS B2401 for common metric sizes but groove tables differ slightly — always use the correct groove spec for the standard being followed. ISO 3601 is referenced in European and international projects; JIS B2401 is used for Japanese-origin equipment; AS568 for American-origin systems.
Reference Standards
- ISO 3601-1:2012
- ISO 3601-2:2016
- ISO 3601-3:2005
Related Terms
- AS568 O-Ring Standard (SAE/ANSI) — AS568 (SAE Aerospace Standard) defines 369 standard O-ring sizes in inch dimensions — each identifie…
- JIS B2401 (Japanese O-Ring Standard) — JIS B2401 is the Japanese Industrial Standard for O-rings, defining P-series (piston/bore), G-series…
- O-Ring Groove / Gland Design — O-ring groove (gland) design specifies groove depth, width, and surface finish to achieve 15–25% dia…