8.4MM CS X 149.5MM ID BLACK BUNA 70D

The H8.4X149.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 149.5 mm (5.886 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 166.3 mm (6.55 in). This o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as Metric O-RING, JIS P150A.

It resists greases and lubricants, many alcohols, and petroleum-based oils. Buna-N (Nitrile) offers low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across general industrial maintenance, construction equipment, and fluid power.

Reference part number H8.4X149.5 when ordering; the item is sold individually. Unit weight is approximately 33.567 g. Check the compound against your process media, pressure and temperature before committing to a design. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.