Ordered as H50245, this is an AS568-245 black Buna-N (Nitrile) 50 Shore A O-Ring measuring an inside diameter of 4.359 in (110.72 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.637 in (117.78 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.
The material holds up against hydraulic fluids, many alcohols, and water. That behavior comes from the compound itself: Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with strong acids or ozone and direct sunlight.
Common environments for this compound include agricultural equipment, hydraulic and pneumatic systems, and automotive.
H50245 ships individually. Review your operating media and conditions against this specification before installation.
Description -245 BLACK BUNA 50D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 4.359 inch (110.72 mm)
Actual Outside Diameter 4.637 inch (117.78 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity