Ordered as H90121, this is an AS568-121 black Buna-N (Nitrile) 90 Shore A O-Ring with 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). The o-ring compresses into its gland to block fluid or gas migration across a joint.
Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists greases and lubricants, many alcohols, and water. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or ketones are present.
Typical settings include construction equipment, hydraulic and pneumatic systems, and automotive.
H90121 ships individually. Unit weight is approximately 0.6511 g and nominal inside diameter is listed as 1 1/16 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description -121 BLACK BUNA 90D 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