The H1.78X91.7 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 91.7 mm (3.61 in), a cross section of 1.78 mm (0.07 in), and an outside diameter of 95.26 mm (3.75 in). This o-ring compresses into its gland to block fluid or gas migration across a joint.
As a material, Buna-N (Nitrile) is known for low compression set under sustained load, strong abrasion and tear resistance. This material stands up to propane and butane, petroleum-based oils, and many alcohols. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or polar solvents.
It sees regular use in general industrial maintenance, fluid power, and agricultural equipment.
Order part number H1.78X91.7, sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description 1.78MM CS X 91.7MM ID BLACK BUNA 70D
Actual Outside Diameter 95.26 mm (3.75 inch)
Actual Cross Section 1.78 mm (0.07 inch)
Actual Inside Diameter 91.7 mm (3.61 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity