Part number H90M3.5X24.7 is a black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 24.7 mm (0.972 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 31.7 mm (1.25 in). An o-ring remains the most cost-effective sealing element available for pressurized assemblies. This item is further identified as Metric O-RING, JIS P25.
As a material, Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, low compression set under sustained load. Expect good resistance to water, many alcohols, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in automotive brake fluid or polar solvents.
It sees regular use in hydraulic and pneumatic systems, agricultural equipment, and automotive.
Stocked as H90M3.5X24.7 and sold individually. Unit weight is approximately 1.1962 g. Check the compound against your process media, pressure and temperature before committing to a design.
Description 3.5MM CS X 24.7MM ID BLACK BUNA 90D
Actual Outside Diameter 31.7 mm (1.25 inch)
Actual Cross Section 3.5 mm (0.138 inch)
Actual Inside Diameter 24.7 mm (0.972 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity