-218 BLACK BUNA 50D O-RING

Part number H50218 is an AS568-218 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 1.234 in (31.34 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.512 in (38.4 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, low compression set under sustained load. It resists petroleum-based oils, water, and hydraulic fluids. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving automotive brake fluid or polar solvents call for a different compound.

Maintenance and OEM teams specify it across agricultural equipment, automotive, and general industrial maintenance.

This item is sold individually under part number H50218. Unit weight is approximately 0.0014 g and nominal inside diameter is listed as 1 1/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.