Size Charts

O-Ring Size Charts

AS568 Standard Sizes (North America)

The AS568 standard is the most commonly used O-ring sizing system in North America.

Dash Number Inner Diameter (in) Cross Section (in) Inner Diameter (mm) Cross Section (mm)
001 0.029 0.040 0.74 1.02
002 0.041 0.050 1.04 1.27
003 0.053 0.050 1.35 1.27
004 0.063 0.050 1.60 1.27
005 0.070 0.050 1.78 1.27

Complete AS568 chart available upon request.

ISO 3601 Metric Sizes

ISO 3601 is the international standard for metric O-ring sizes.

ID x CS (mm) Inner Diameter Cross Section
2.00 x 2.00 2.00 mm 2.00 mm
3.00 x 2.50 3.00 mm 2.50 mm
4.00 x 2.00 4.00 mm 2.00 mm
5.00 x 2.00 5.00 mm 2.00 mm
6.00 x 2.00 6.00 mm 2.00 mm

Complete ISO 3601 chart available upon request.