H70MD377 is an AS568-377 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 9.975 in (253.37 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 10.395 in (264.03 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.
This material stands up to water, hydraulic fluids, and many alcohols. Buna-N (Nitrile) is specified for low compression set under sustained load, strong abrasion and tear resistance. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in polar solvents or ketones.
The compound is metal detectable for HACCP and foreign-body control programs. It sees regular use in general industrial maintenance, agricultural equipment, and fluid power.
Stocked as H70MD377 and sold individually. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description -377 BLACK BUNA 70D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 9.975 inch (253.37 mm)
Actual Outside Diameter 10.395 inch (264.03 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable