Ordered as H70MD902, this is an AS568-902 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 0.239 in (6.07 mm), a cross section of 0.064 in (1.63 mm), and an outside diameter of 0.367 in (9.32 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
Buna-N (Nitrile) is known for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The compound resists greases and lubricants, many alcohols, and petroleum-based oils. 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 ketones or strong acids are present.
The compound is metal detectable for HACCP and foreign-body control programs. Common environments for this compound include construction equipment, general industrial maintenance, and hydraulic and pneumatic systems.
H70MD902 ships individually. 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 -902 BLACK BUNA 70D O-RING
Actual Cross Section 0.064 inch (1.63 mm)
Actual Inside Diameter 0.239 inch (6.07 mm)
Actual Outside Diameter 0.367 inch (9.32 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable