O-kroužek 18.7 mm 3.5 mm pryž nitrilová NBR černá

This o-ring is made of black nitrile (NBR 90) and is suited to SAE flange standard. This o-ring is used to form a tight seal to prevent particles to contaminate and to prevent leakage of fluid. The material is of 90 shore hardness and offer good performance when exposed to temperature, oils.