O-Ring Size Chart

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. Once you have these measurements you then need to decide if the size you need is listed below or if the best fit will be a metric oring. Once you have the AS-568 dash size you need, select the compound link at the bottom of the page to place your order.

To calculate an o-ring's outside diameter (OD) you may use this formula: 2(CS) + ID = OD
If you have the OD and need to find the ID use this formula: OD - 2(CS) = ID

Introducing Olypsys®: The Revolutionary App for Measuring O-Rings

Welcome to the exciting world of Olypsys®, the groundbreaking app that revolutionizes the way we measure O-Rings. The O-Ring Store LLC is thrilled to present this innovative tool that simplifies and enhances the O-Ring measurement process. We have been searching for years for better ways to "make getting o-rings easy." We have finally found the product and service that will truly make a difference in our industry. In this YouTube Video, we will provide you with an overview of Olypsys®, its technical details, and step-by-step instructions for measuring an O-Ring. Links: Free User Grid & Pro-Grid

Link to easy to read PDF version: O-Ring Size Chart

Link to order AS568 O-Rings online: AS568 O-Rings or Search AS568-010 (your dash size)