The HQ4281 is an AS568-281 black Buna-N (Nitrile) 70 Shore A Quad-Ring with 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). This quad-ring resists spiral failure in reciprocating service thanks to its multi-lobe geometry.
This material stands up to many alcohols, hydraulic fluids, and water. Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in automotive brake fluid or ozone and direct sunlight. The profile itself contributes resistance to the spiral twisting that defeats round-section rings and lower compressive load required to achieve a seal.
Common environments for this compound include construction equipment, hydraulic and pneumatic systems, and automotive.
HQ4281 ships individually. Nominal inside diameter is listed as 15 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.
Description *4281-366Y MINNESOTA RUBBER QUAD RING
Actual Inside Diameter 14.984 inch (380.59 mm)
Actual Outside Diameter 15.262 inch (387.65 mm)
Actual Cross Section 0.139 inch (3.53 mm)
Measurement System Imperial
Product Category O-Rings - Square/Quad - Premium