8.4MM CS X 169.5MM ID BLACK BUNA 90D

The H90M8.4X169.5 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 169.5 mm (6.673 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 186.3 mm (7.33 in). This o-ring delivers dependable bidirectional sealing in a compact groove envelope. This item is further identified as Metric O-RING, JIS P170.

Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and low compression set under sustained load. The material holds up against many alcohols, greases and lubricants, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where polar solvents or strong acids are present.

Maintenance and OEM teams specify it across general industrial maintenance, automotive, and agricultural equipment.

H90M8.4X169.5 ships individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.