Ordered as H2.5X56, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 56 mm (2.205 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 61 mm (2.4 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.
As a material, Buna-N (Nitrile) delivers an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. This material stands up to many alcohols, petroleum-based oils, and propane and butane. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where ozone and direct sunlight or ketones are present.
You will find this material specified across general industrial maintenance, agricultural equipment, and construction equipment.
Stocked as H2.5X56 and sold individually. Unit weight is approximately 1.156 g. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
description 2.5MM CS X 56MM ID BLACK BUNA 70D
uf_description2 METRIC O-RING
Actual_OD 61 mm (2.4 inch)
Actual_CS 2.5 mm (0.098 inch)
Actual_ID 56 mm (2.205 inch)
ProductCode Description O-Rings - Metric - Commodity