8.4MM CS X 179.1MM ID BLACK BUNA 70D

Buna-N O-Ring, 8.4 x 179.1 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:
H8.4X179.1
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Product Specification

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The H8.4X179.1 is a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 179.1 mm (7.051 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 195.9 mm (7.71 in). 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 an economical choice for high-volume maintenance programs, strong abrasion and tear resistance. This material stands up to many alcohols, petroleum-based oils, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where polar solvents or strong acids are present.

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

Order part number H8.4X179.1, sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Item
H8.4X179.1
Description
8.4MM CS X 179.1MM ID BLACK BUNA 70D
Actual Outside Diameter
195.9 mm (7.71 inch)
Actual Cross Section
8.4 mm (0.331 inch)
Actual Inside Diameter
179.1 mm (7.051 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity