6MM CS X 56MM ID BLACK BUNA 70D

Buna-N O-Ring, 6 x 56 mm, 70A, Black, -40 to 250°F

Status
Available
Est. Ship Date
31 Oct 2026
Material
Buna-N (Nitrile / NBR)
Durometer
70 Shore A
Cross Section Type
Round
Color
Black
Minimum Temperature
-40°F (-40°C)
Maximum Temperature
250°F (121°C)
Unit of Measure
EA
SKU:
H6X56
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Product Specification

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H6X56 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 56 mm (2.205 in), a cross section of 6 mm (0.236 in), and an outside diameter of 68 mm (2.68 in). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, Buna-N (Nitrile) is widely chosen for low compression set under sustained load and an economical choice for high-volume maintenance programs. This material stands up to hydraulic fluids, water, and propane and butane. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound.

Common environments for this compound include construction equipment, hydraulic and pneumatic systems, and general industrial maintenance.

Reference part number H6X56 when ordering; the item is sold individually. Unit weight is approximately 6.745 g. 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.
Item
H6X56
Description
6MM CS X 56MM ID BLACK BUNA 70D
Actual Outside Diameter
68 mm (2.68 inch)
Actual Cross Section
6 mm (0.236 inch)
Actual Inside Diameter
56 mm (2.205 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity