8.4MM CS X 184.5MM ID BLACK BUNA 70D

Buna-N O-Ring, 8.4 x 184.5 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:
H8.4X184.5
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Product Specification

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The H8.4X184.5 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 184.5 mm (7.264 in), a cross section of 8.4 mm (0.331 in), and an outside diameter of 201.3 mm (7.93 in). This o-ring delivers dependable bidirectional sealing in a compact groove envelope. Source specification: Metric O-RING, JIS P185.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, strong abrasion and tear resistance. It resists propane and butane, hydraulic fluids, and greases and lubricants. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Verify compatibility before use with automotive brake fluid or ozone and direct sunlight.

You will find this material specified across fluid power, construction equipment, and automotive.

Stocked as H8.4X184.5 and sold individually. Unit weight is approximately 41.116 g. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.
Item
H8.4X184.5
Description
8.4MM CS X 184.5MM ID BLACK BUNA 70D
Actual Outside Diameter
201.3 mm (7.93 inch)
Actual Cross Section
8.4 mm (0.331 inch)
Actual Inside Diameter
184.5 mm (7.264 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity