Part number H2X21 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 21 mm (0.827 in), a cross section of 2 mm (0.079 in), and an outside diameter of 25 mm (0.98 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.
As a material, Buna-N (Nitrile) is known for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. It resists hydraulic fluids, greases and lubricants, and many alcohols. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in strong acids or ozone and direct sunlight.
It sees regular use in construction equipment, fluid power, and automotive.
This item is sold individually under part number H2X21. Unit weight is approximately 0.284 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.
description 2MM CS X 21MM ID BLACK BUNA 70D
uf_description2 METRIC O-RING
Actual_OD 25 mm (0.98 inch)
Actual_CS 2 mm (0.079 inch)
Actual_ID 21 mm (0.827 inch)
ProductCode Description O-Rings - Metric - Commodity