Back-up Ring Size Chart

The chart gives the metric and inch dimensions for the most common AS568 sizes of backup rings.

NOTE: The “A” dimension, or Axial Height, applies only to the rubber contoured backup rings. PTFE backup rings are flat, so do not have this contour.

Filter table contents


Select field to search.        Enter search value.     Tip: Partial number finds all matches.


Backup Ring Size Chart


TF 800 856 1344 

O 713 699 1344

F  713 699 1349

Call Us

518 Rankin Circle North

Houston, Texas 77073

Our Address
Contact Us
Email Us

Manufacturing Office 

13625 Rankin Park Circle

Houston, Texas 77073

O 713 699 1344

Canada Office 

9814-44 Avenue NW

Edmonton, AB Canada


O 780 434 1111