568-444 BUNA 70 SQUARE CUT RINGS

Part number SH70444 is an AS568-444 black Buna-N (Nitrile) 70 Shore A Square-Cut Ring measuring an inside diameter of 7.725 in (196.22 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.275 in (210.19 mm). A square-cut ring provides an economical lathe-cut alternative where a moulded o-ring is not required.

This material stands up to water, hydraulic fluids, and petroleum-based oils. Buna-N (Nitrile) is specified for low compression set under sustained load and an economical choice for high-volume maintenance programs. 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 automotive brake fluid. The profile itself contributes greater resistance to extrusion than a round section of the same size and simple lathe-cut manufacture at low tooling cost. Note that a square section is less suited to high-speed rotary service, where the larger contact area raises friction and heat.

Common environments for this compound include hydraulic and pneumatic systems, agricultural equipment, and construction equipment.

Reference part number SH70444 when ordering; the item is sold individually. Unit weight is approximately 36.011 g. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.