O-Ring Standards
Complete dimensional references for AS568, ISO 3601, DIN 3771, BS 4518, JIS B 2401, SMS 1588 and General Metric sizes
AS568 Standard
369 imperial sizes with dash numbers from 001 to 475. Cross sections of 0.040 in, 0.050 in, 0.062 in, 0.103 in, 0.139 in, and 0.210 in.
ISO 3601 Standard
Metric O-ring sizes organized by inside diameter and cross section. Covers 1.80mm, 2.65mm, 3.55mm, 5.30mm, and 7.00mm cross sections.
DIN 3771 Standard
German metric O-ring sizes with A, B and C series. Covers 1.78mm to 10.00mm cross sections for hydraulic and general engineering.
BS 4518 Standard
British Standard metric O-ring sizes. Covers inside diameters from 0.74mm to 658mm with standard cross sections.
JIS B 2401 Standard
Japanese metric O-ring sizes with P, G and V series. Covers 1.9mm to 8.4mm cross sections for static, dynamic and vacuum seals.
SMS 1588 Standard
Swedish metric O-ring sizes for Scandinavian industrial and marine applications. Cross sections from 1.00mm to 8.00mm, aligned with Nordic procurement specs.
General Metric Sizes
Universal metric O-ring size chart for general engineering. Covers the overlap between ISO 3601, DIN 3771 and JIS B 2401.
NF T47-501 Standard
French metric O-ring sizes for hydraulic and automotive sealing. Widely used in France, Belgium and North Africa.
JASO F404 Standard
Japanese automotive O-ring sizes for fuel, oil, coolant and A/C systems. Essential for JDM and global automotive supply chains.