Part number H70166 is an AS568-166 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 6.737 in (171.12 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 6.943 in (176.35 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.
The material holds up against greases and lubricants, many alcohols, and propane and butane. Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in ketones or automotive brake fluid.
Maintenance and OEM teams specify it across construction equipment, hydraulic and pneumatic systems, and general industrial maintenance.
Order part number H70166, sold individually. Unit weight is approximately 3.57 g and nominal inside diameter is listed as 6 3/4 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description -166 BLACK BUNA 70D O-RING
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 6.737 inch (171.12 mm)
Actual Outside Diameter 6.943 inch (176.35 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity