*Q-105 BUNA 70 Q RING

Part number QH70105 is an AS568-105 black Buna-N (Nitrile) 70 Shore A quad profile Quad-Ring with an inside diameter of 0.143 in (3.63 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 0.349 in (8.86 mm). A quad-ring provides a dual sealing band on each contact face for improved reliability.

The material holds up against hydraulic fluids, water, and petroleum-based oils. That behavior comes from the compound itself: Buna-N (Nitrile) is valued for low compression set under sustained load, strong abrasion and tear resistance. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ozone and direct sunlight or ketones.

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

Reference part number QH70105 when ordering; the item is sold individually. Unit weight is approximately 0.136 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.