8MM CS X 425MM ID BLACK BUNA 70D

Buna-N O-Ring, 8 x 425 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:
H8X425
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Product Specification

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Ordered as H8X425, this is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 425 mm (16.732 in), a cross section of 8 mm (0.315 in), and an outside diameter of 441 mm (17.36 in). The o-ring remains the most cost-effective sealing element available for pressurized assemblies.

As a material, Buna-N (Nitrile) is valued for low compression set under sustained load and an economical choice for high-volume maintenance programs. This material stands up to water, propane and butane, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving ketones or polar solvents call for a different compound.

You will find this material specified across automotive, construction equipment, and hydraulic and pneumatic systems.

Order part number H8X425, sold individually. Unit weight is approximately 82.97 g. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Item
H8X425
Description
8MM CS X 425MM ID BLACK BUNA 70D
Actual Outside Diameter
441 mm (17.36 inch)
Actual Cross Section
8 mm (0.315 inch)
Actual Inside Diameter
425 mm (16.732 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity