Part number H70MD281 is an AS568-281 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 14.984 in (380.59 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 15.262 in (387.65 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.
Buna-N (Nitrile) is specified here for most widely specified general-purpose sealing elastomer and low compression set under sustained load. It resists water, hydraulic fluids, and propane and butane. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or polar solvents call for a different compound.
The compound is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across general industrial maintenance, hydraulic and pneumatic systems, and fluid power.
Order part number H70MD281, sold individually. Nominal inside diameter is listed as 15 inch. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description -281 BLACK BUNA 70D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 14.984 inch (380.59 mm)
Actual Outside Diameter 15.262 inch (387.65 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable