Ordered as H70MD432, this is an AS568-432 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 5.35 in (135.89 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 5.9 in (149.86 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
Buna-N (Nitrile) is specified here for low compression set under sustained load and economical choice for high-volume maintenance programs. The material holds up against propane and butane, petroleum-based oils, and many alcohols. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ozone and direct sunlight or strong acids will shorten service life.
This o-ring is metal detectable for HACCP and foreign-body control programs. You will find this material specified across hydraulic and pneumatic systems, general industrial maintenance, and automotive.
Order part number H70MD432, sold individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Description -432 BLACK BUNA 70D O-RING
Actual Cross Section 0.275 inch (6.99 mm)
Actual Inside Diameter 5.35 inch (135.89 mm)
Actual Outside Diameter 5.9 inch (149.86 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable