The H70MD284 is an AS568-284 black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 17.955 in (456.06 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 18.233 in (463.12 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
As a material, Buna-N (Nitrile) is known for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. The compound resists petroleum-based oils, hydraulic fluids, and many alcohols. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C).
The compound is metal detectable for HACCP and foreign-body control programs. You will find this material specified across automotive, hydraulic and pneumatic systems, and fluid power.
Order part number H70MD284, sold individually. 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.
Description -284 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 17.955 inch (456.06 mm)
Actual Outside Diameter 18.233 inch (463.12 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable