568-281 BUNA 70 SQUARE CUT RINGS

Part number SH70281 is an AS568-281 black Buna-N (Nitrile) 70 Shore A square profile Quad-Ring measuring an inside diameter of 14.984 in (380.59 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 15.262 in (387.65 mm). A quad-ring seats in a standard o-ring gland while offering improved dynamic performance.

This material stands up to hydraulic fluids, many alcohols, and propane and butane. That behavior comes from the compound itself: Buna-N (Nitrile) offers 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).

Common environments for this compound include construction equipment, automotive, and fluid power.

Order part number SH70281, sold individually. Nominal inside diameter is listed as 15 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.