Ordered as H3.5X25.2, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 25.2 mm (0.992 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 32.2 mm (1.27 in). The o-ring compresses into its gland to block fluid or gas migration across a joint. Supplementary detail from the product record: Metric O-RING, JIS P25.5.
Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. This material stands up to many alcohols, petroleum-based oils, and hydraulic fluids. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or polar solvents are present.
Typical settings include automotive, construction equipment, and fluid power.
This item is sold individually under part number H3.5X25.2. Unit weight is approximately 1.079 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
description 3.5MM CS X 25.2MM ID BLACK BUNA 70D
uf_description2 METRIC O-RING, JIS P25.5
Actual_OD 32.2 mm (1.27 inch)
Actual_CS 3.5 mm (0.138 inch)
Actual_ID 25.2 mm (0.992 inch)
ProductCode Description O-Rings - Metric - Commodity