1.5MM CS X 4.5MM ID BLACK BUNA 70D

Ordered as H1.5X4.5, this is a black Buna-N (Nitrile) 70 Shore A O-Ring with 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). The o-ring delivers dependable bidirectional sealing in a compact groove envelope. Source specification: Metric O-RING, JIS S5.

This material stands up to petroleum-based oils, greases and lubricants, and many alcohols. That behavior comes from the compound itself: Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, low compression set under sustained load. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or strong acids.

Maintenance and OEM teams specify it across construction equipment, agricultural equipment, and hydraulic and pneumatic systems.

Stocked as H1.5X4.5 and sold individually. Unit weight is approximately 0.0422 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.