APG stocks the H50241, an AS568-241 black Buna-N (Nitrile) 50 Shore A O-Ring supplied with an inside diameter of 3.859 in (98.02 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.137 in (105.08 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
As a material, Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The material holds up against greases and lubricants, petroleum-based oils, and propane and butane. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).
You will find this material specified across fluid power, construction equipment, and hydraulic and pneumatic systems.
Stocked as H50241 and sold individually. Unit weight is approximately 0.004 g and nominal inside diameter is listed as 3 7/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description -241 BLACK BUNA 50D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.859 inch (98.02 mm)
Actual Outside Diameter 4.137 inch (105.08 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity