AS568-252 Nitrile O-Ring - Black - 70 Durometer An O-ring is a round, mechanical gasket designed to be seated in a groove and compressed during assembly between two or more parts, creating a seal interface. O-Rings are one of the most common types of seals because they’re inexpensive, reliable, and have simple mounting requirements.O-Rings are one of the most common types of seals because they’re inexpensive, reliable, and have simple mounting requirements.O-Rings are one of the most common types of seals because they’re inexpensive, reliable, and have simple mounting requirements. O-Rings may be used in static applications where little range of motion is required or in dynamic applications, like rotating pump shafts and hydraulic cylinder positions. Performs Well In: Petroleum-based oils and fuels; Aliphatic hydrocarbons; Vegetable oils; Silicone oils and greases; Ethylene glycol; Dilute acids; Water up to 100ºC (121ºF) Specifications: Material Nitrile Color Black Durometer 70 Size 252 CS (in) 0.139 ID (in) 5.234 OD (in) 5.512 CS (mm) 3.53 ID (mm) 132.94 OD (mm) 140 Compound N70-A101 Minimum Temperature -22°F (-30°C) Maximum Temperature 250°F (121°C)