8.4MM CS X 334.5MM ID BLACK BUNA 90D

Ordered as H90M8.4X334.5, this is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 334.5 mm (13.169 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 351.3 mm (13.83 in). The o-ring delivers dependable bidirectional sealing in a compact groove envelope. Supplementary detail from the product record: Metric O-RING, JIS P335.

The material holds up against propane and butane, many alcohols, and greases and lubricants. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, 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. It is not the right choice where polar solvents or ozone and direct sunlight are present.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, automotive, and agricultural equipment.

Stocked as H90M8.4X334.5 and sold individually. Unit weight is approximately 82.506 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.