Part number H50239 is an AS568-239 black Buna-N (Nitrile) 50 Shore A O-Ring measuring an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.
Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The material holds up against greases and lubricants, propane and butane, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.
It sees regular use in agricultural equipment, hydraulic and pneumatic systems, and fluid power.
Order part number H50239, sold individually. Nominal inside diameter is listed as 3 5/8 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description -239 BLACK BUNA 50D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 3.609 inch (91.67 mm)
Actual Outside Diameter 3.887 inch (98.73 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity