This o-ring is supplied in AS568-121 black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 1.049 in (26.64 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.255 in (31.88 mm), catalogued under part number H70121. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
Buna-N (Nitrile) is valued for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The compound resists greases and lubricants, petroleum-based oils, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).
Maintenance and OEM teams specify it across construction equipment, agricultural equipment, and automotive.
Order part number H70121, sold individually. Unit weight is approximately 0.6052 g and nominal inside diameter is listed as 1 1/16 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description -121 BLACK BUNA 70D O-RING
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 1.049 inch (26.64 mm)
Actual Outside Diameter 1.255 inch (31.88 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity