The H70MD434 is an AS568-434 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 5.6 in (142.24 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.15 in (156.21 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
The compound resists hydraulic fluids, water, and many alcohols. Buna-N (Nitrile) is specified for strong abrasion and tear resistance, low compression set under sustained load. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or polar solvents are present.
This item is metal detectable for HACCP and foreign-body control programs. Typical settings include hydraulic and pneumatic systems, construction equipment, and general industrial maintenance.
This item is sold individually under part number H70MD434. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description -434 BLACK BUNA 70D O-RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 5.6 inch (142.24 mm)
Actual Outside Diameter 6.15 inch (156.21 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable