Part number H4X54 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 54 mm (2.126 in), a cross section of 4 mm (0.157 in), and an outside diameter of 62 mm (2.44 in). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
It resists water, many alcohols, and petroleum-based oils. Buna-N (Nitrile) delivers strong abrasion and tear resistance, low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).
Common environments for this compound include fluid power, hydraulic and pneumatic systems, and construction equipment.
Order part number H4X54, sold individually. Unit weight is approximately 2.88 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
description 4MM CS X 54MM ID BLACK BUNA 70D
uf_description2 METRIC O-RING
Actual_OD 62 mm (2.44 inch)
Actual_CS 4 mm (0.157 inch)
Actual_ID 54 mm (2.126 inch)
ProductCode Description O-Rings - Metric - Commodity