1.5MM CS X 4.5MM ID BLACK BUNA 90D

Part number H90M1.5X4.5 is a black Buna-N (Nitrile) 90 Shore A O-Ring built to an inside diameter of 4.5 mm (0.177 in), a cross section of 1.5 mm (0.059 in), and an outside diameter of 7.5 mm (0.3 in). An o-ring compresses into its gland to block fluid or gas migration across a joint. Source specification: Metric O-RING, JIS S5.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, low compression set under sustained load. The material holds up against propane and butane, many alcohols, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

Maintenance and OEM teams specify it across general industrial maintenance, construction equipment, and agricultural equipment.

H90M1.5X4.5 ships individually. Unit weight is approximately 0.0485 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.