The H50281 is an AS568-281 black Buna-N (Nitrile) 50 Shore A O-Ring with an inside diameter of 14.984 in (380.59 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 15.262 in (387.65 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
The compound resists hydraulic fluids, propane and butane, and many alcohols. Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Verify compatibility before use with automotive brake fluid or strong acids.
Maintenance and OEM teams specify it across general industrial maintenance, agricultural equipment, and automotive.
Order part number H50281, sold individually. Nominal inside diameter is listed as 15 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description -281 BLACK BUNA 50D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 14.984 inch (380.59 mm)
Actual Outside Diameter 15.262 inch (387.65 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity