The H90M5X115 is a black Buna-N (Nitrile) 90 Shore A O-Ring with an inside diameter of 115 mm (4.528 in), a cross section of 5 mm (0.197 in), and an outside diameter of 125 mm (4.92 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
Buna-N (Nitrile) is specified here for strong abrasion and tear resistance, most widely specified general-purpose sealing elastomer. This material stands up to greases and lubricants, hydraulic fluids, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).
Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and construction equipment.
Order part number H90M5X115, sold individually. Unit weight is approximately 9.71 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description 5MM CS X 115MM ID BLACK BUNA 90D
Actual Outside Diameter 125 mm (4.92 inch)
Actual Cross Section 5 mm (0.197 inch)
Actual Inside Diameter 115 mm (4.528 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity