O-Ring Cross Reference

[Titaniumboy]

Here are the Mercruiser and Volvo Penta O-Ring cross reference to nominal sized o-rings. These two pages are part of a 10 page GLM Marine document that also lists o-ring sizes for Mercury/Mariner/Force and Johnson/Evinrude. Oil seal shaft and bore sizes are also in the full pdf.

https://www.glmmarine.com/pdf/OilSeal-O ... Charts.pdf

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The GLM Marine pdf is attached here in case the GLM Marine web link gets broken in the future.

Oil Seal and O-Ring Size Charts by GLM.pdf

Once you have the nominal size of the o-ring, then you can find that o-rings AS568 “dash” number, which is a unique number that denotes specific O-ring dimensions.

https://www.marcorubber.com/downloads/m ... -as568.pdf

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marco-o-ring-size-chart-as568.pdf

I’ve found this full-size printable o-ring chart from Captain O-Ring to be very useful. CAUTION: Clicking on the link will start downloading a large 32 MB pdf file.

https://www.captainoring.com/uploads/4/ ... 061219.pdf

Be sure to print at "actual size" or "100% scale" and not "fit to page" or "shrink to page" in order to ensure that your document prints the o-ring sizes accurately. There is a 1" long calibration line at the bottom of the first page that you can measure with a ruler to confirm the page printed at actual size.

Below is a screen shot of only the first page of the 23 page chart.

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Captain O-Ring also has cross reference charts for paintball, scuba, firearms, and air guns.

https://www.captainoring.com/supportmanuals.html


Disclaimer: I do not have any actual experience buying or using any of the above companies products.

[jhnmdahl]

Good reference info. I've always liked buying a non-branded o-ring if I was sure of the size because it's such an absurd markup item for manufacturer parts. My favorite source is:

https://www.mcmaster.com/o-rings/

[Titaniumboy]

McMaster-Carr is a great place to get “jelly bean” parts like o-rings. My one beef is that their website doesnt provide reference material in a format that shows up well on CC.