APG stocks the H70MD341, an AS568-341 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.475 in (88.27 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.895 in (98.93 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.
Expect good resistance to greases and lubricants, propane and butane, and hydraulic fluids. Buna-N (Nitrile) is specified for reliable performance in both static and dynamic service, strong abrasion and tear resistance. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). It is not the right choice where automotive brake fluid or polar solvents are present.
The compound is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across hydraulic and pneumatic systems, agricultural equipment, and general industrial maintenance.
Reference part number H70MD341 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
description -341 BLACK BUNA 70D O-RING
uf_description2 METAL DETECTABLE, 0.210" (5.33MM) CS X 3.475" (88.27MM) ID
Actual_CS 0.21 inch (5.33 mm)
Actual_ID 3.475 inch (88.27 mm)
Actual_OD 3.895 inch (98.93 mm)
ProductCode Description O-Rings - FDA / Metal Detectable