-428 BLACK BUNA 70D O-RING

APG stocks the H70MD428, an AS568-428 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 4.85 in (123.19 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.4 in (137.16 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The material holds up against petroleum-based oils, propane and butane, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.

This item is metal detectable for HACCP and foreign-body control programs. You will find this material specified across automotive, agricultural equipment, and construction equipment.

Order part number H70MD428, sold individually. Nominal inside diameter is listed as 4 7/8 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.