APG stocks the H50240, an AS568-240 black Buna-N (Nitrile) 50 Shore A O-Ring supplied with an inside diameter of 3.734 in (94.84 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.012 in (101.9 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.
As a material, Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, low compression set under sustained load. Expect good resistance to petroleum-based oils, greases and lubricants, and many alcohols. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where strong acids or ozone and direct sunlight are present.
Maintenance and OEM teams specify it across agricultural equipment, hydraulic and pneumatic systems, and automotive.
H50240 ships individually. Nominal inside diameter is listed as 3 3/4 inch. Review your operating media and conditions against this specification before installation.
Description -240 BLACK BUNA 50D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.734 inch (94.84 mm)
Actual Outside Diameter 4.012 inch (101.9 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity