The H70238 is an AS568-238 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 3.484 in (88.49 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.762 in (95.55 mm). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
As a material, Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. It resists many alcohols, petroleum-based oils, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with ozone and direct sunlight or automotive brake fluid.
Common environments for this compound include general industrial maintenance, fluid power, and automotive.
Order part number H70238, sold individually. Unit weight is approximately 3.492 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Description -238 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.484 inch (88.49 mm)
Actual Outside Diameter 3.762 inch (95.55 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity