O-Rings have always been tough to check using an ordinary A or M scale durometer, but now Rex Gauge Co. offers the O-Ring Fixturing set (ORF-1) which enables the user to check o-rings with the combination of an A or M scale Rex Durometer* and a Rex operating stand. The set consists of five fixtures and one set plug (for setting operating stand travel). The standard O.R.F.-1 set can be used to test O-Rings with cross sections of 1/16″, 3/32″, 1/8″, 3/16″ and 1/4″. Custom and metric o-ring fixtures can be special ordered through Rex Gauge Co.

* Can be used with any model Rex Durometer except the 1500


  • For use with a Rex Type A or M durometer and operating stand
  • 5 standard English sized fixtures and set plug included
  • Stainless steel construction
  • Made in the USA