-343 BLACK BUNA 70D O-RING

This o-ring is supplied in AS568-343 black Buna-N (Nitrile) 70 Shore A supplied with an inside diameter of 3.725 in (94.62 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.145 in (105.28 mm), catalogued under part number H70343. It remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. It resists water, hydraulic fluids, and petroleum-based oils. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to polar solvents or strong acids will shorten service life.

Maintenance and OEM teams specify it across fluid power, agricultural equipment, and general industrial maintenance.

This item is sold individually under part number H70343. Unit weight is approximately 8.55 g and nominal inside diameter is listed as 3 3/4 inch. Review your operating media and conditions against this specification before installation.