8.4MM CS X 208.5MM ID BLACK BUNA 70D

Buna-N O-Ring, 8.4 x 208.5 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:
H8.4X208.5
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Product Specification

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Part number H8.4X208.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 208.5 mm (8.209 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 225.3 mm (8.87 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. Source specification: Metric O-RING, JIS P209.

The material holds up against water, greases and lubricants, and hydraulic fluids. Buna-N (Nitrile) is valued for an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Applications involving polar solvents or ketones call for a different compound.

Common environments for this compound include general industrial maintenance, agricultural equipment, and construction equipment.

H8.4X208.5 ships individually. Unit weight is approximately 46.614 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Item
H8.4X208.5
Description
8.4MM CS X 208.5MM ID BLACK BUNA 70D
Actual Outside Diameter
225.3 mm (8.87 inch)
Actual Cross Section
8.4 mm (0.331 inch)
Actual Inside Diameter
208.5 mm (8.209 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity