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Old 15th August 2008, 11:19 PM   #7
Dream Team - School Guru
Join Date: Aug 2006
Posts: 2,177

Hi Brian,
I measured an O-ring out of my spare parts box today and here's what I got.
Metric O-rings are measured/specified/classified by the Inside Diameter (ID) and the Cross Section (CS).
The O-ring from my kit is 2.0 mm CS and 8.5 mm ID.
The part number is therefore M2x8.5.
The Outside Diameter (while not specified) is the 8.5 mm + 4.0 mm or 12.00-12.20 mm.
I found a wholesale distributor online with a very nice chart of metric O-Rings.
I guess you could call them and see who distributes their Metric products in your area.
Here's the link to the chart:
Hope this helps,
Roger is offline   Reply With Quote