Sourced from reputable suppliers in the USA, these O-rings meet ASTM D2000 and SAE J200 standards for rubber products, and SAE AS568 standards for sizing.
These O-rings are Buna-N rubber with a hardness (durometer) of 70A. In my experience, 70A is the most common hardness for general purpose industrial applications. 70A is also called "medium" hardness. Buna-N, also known as nitrile rubber, works well in applications exposed to hydraulic oil, grease, machine oil, motor oil, mild chemicals, and water.
These O-rings have a round profile (as opposed to square or X profile).
Temperature range: -40° to 215°F (-40° to 100°C)
Orders will be bagged and sent in an envelope via USPS First Class Mail.
