Ordered as H4X43, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 43 mm (1.693 in), a cross section of 4 mm (0.157 in), and an outside diameter of 51 mm (2.01 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.
It resists many alcohols, water, and greases and lubricants. Buna-N (Nitrile) is widely chosen for reliable performance in both static and dynamic service, an economical choice for high-volume maintenance programs. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or ozone and direct sunlight.
It sees regular use in construction equipment, automotive, and agricultural equipment.
H4X43 ships individually. Unit weight is approximately 0.0024 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description 4MM CS X 43MM ID BLACK BUNA 70D
Actual Outside Diameter 51 mm (2.01 inch)
Actual Cross Section 4 mm (0.157 inch)
Actual Inside Diameter 43 mm (1.693 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity