APG stocks the H70MD342, an AS568-342 black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 3.6 in (91.44 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.02 in (102.11 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
The compound resists propane and butane, hydraulic fluids, and many alcohols. Buna-N (Nitrile) offers reliable performance in both static and dynamic service, low compression set under sustained load. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service.
The compound is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across automotive, agricultural equipment, and hydraulic and pneumatic systems.
This item is sold individually under part number H70MD342. Application requirements vary, so validate compatibility with your process conditions prior to installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Description -342 BLACK BUNA 70D O-RING
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 3.6 inch (91.44 mm)
Actual Outside Diameter 4.02 inch (102.11 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable