HQ4145 is an AS568-145 black Buna-N (Nitrile) 70 Shore A Quad-Ring with an inside diameter of 2.55 in (64.77 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.756 in (70 mm). In service, this quad-ring uses a four-lobed profile to create two sealing surfaces per side, reducing the squeeze needed to seal.
The material holds up against water, greases and lubricants, and many alcohols. Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with strong acids or automotive brake fluid. The profile itself contributes two sealing bands per contact face rather than one and a parting line located away from the sealing surface.
Maintenance and OEM teams specify it across general industrial maintenance, construction equipment, and hydraulic and pneumatic systems.
HQ4145 ships individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Description *4145-366Y MINNESOTA RUBBER QUAD RING
Actual Inside Diameter 2.55 inch (64.77 mm)
Actual Outside Diameter 2.756 inch (70 mm)
Actual Cross Section 0.103 inch (2.62 mm)
Measurement System Imperial
Product Category O-Rings - Square/Quad - Premium