568-256 BUNA 70 SQUARE CUT RINGS

Part number SH70256 is an AS568-256 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring measuring an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). A quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.

Buna-N (Nitrile) is known for low compression set under sustained load, reliable performance in both static and dynamic service. It resists many alcohols, greases and lubricants, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

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

Order part number SH70256, sold individually. Unit weight is approximately 5.671 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.