What size are the O-rings?

There are various size options depending on the ID you need to measure, but the most common sizes are 2-12”, 12-24”, 24-36”, 36-48”, and 48-60”.

How do I know my Big O ring size?

How to Measure O-Rings

1. Place the O-ring on a clean, flat, level surface.
2. Determine the inside diameter by using a ruler to measure from one inner edge to another.
3. Use a ruler to measure the diameter, from one outer corner of the O-ring to the other outer corner.
4. Finally, measure the cross-section.

How are O ring sizes specified?

Dimensionally specifying an o-ring can typically be done with just two dimensions, the inner diameter (ID) and the cross-section (CS). Occasionally, an O-ring may be specified with an outer diameter (OD) and cross-section or an inner diameter and outer diameter.

Are O-rings sized by ID or OD?

O-rings are actually really easy to measure. All you need to do is measure the internal diameter (ID) or outside diameter (OD) and the width or cross section (C/S) of the o ring. The diagram shows exactly where these dimensions are to be found.

Do you need to know how to size an O-ring?

If you need to know how to size an O-ring, consider starting with these AS568 O-ring sizes so you will not have to purchase custom O-ring sizes which can be more costly. This AS568 O-ring chart is a SAE size standard for O-rings and shows AS568 Rev B or AS568B O-ring sizes which supersedes AS568 Rev A or AS568A O-ring dimensions.

How big are O rings in the Technical Handbook?

Technical Handbook O-rings. Standard O-ring Sizes (300 Series 309 to 395 cross section Diameters w = .210 ± .005 inches, w = 5,33 ± 0,13 mm Size Nominal Size Standard O-ring Size Metric O-ring Size Only (Inches) (Inches) (millimeters) AS 568A Actual Per AS 568 A Actual Per AS 568A Uniform Dash No. I.D.

Which is the correct size for an AS568 O ring?

This AS568 O-ring chart is a SAE size standard for O-rings and shows AS568 Rev B or AS568B O-ring sizes which supersedes AS568 Rev A or AS568A O-ring dimensions. We have millions of AS568 O-rings in stock which can be purchased easily through our O-rings Online Store.

How are O rings shown in a catalog?

In most cases the O-Rings are presented from top-to-bottom and left-to right. In cases where O- Rings overlap, the label has been positioned so that it will identify only one size. O-Rings that are too large to illustrate are listed in cross sectional groups at that back of the catalog