5.3MM CS X 185MM ID BLACK BUNA 70D

Buna-N O-Ring, 5.3 x 185 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:
H5.3X185
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Product Specification

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APG stocks the H5.3X185, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 185 mm (7.283 in), a cross section of 5.3 mm (0.209 in), and an outside diameter of 195.6 mm (7.7 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

As a material, Buna-N (Nitrile) is specified for the most widely specified general-purpose sealing elastomer and an economical choice for high-volume maintenance programs. The compound resists hydraulic fluids, propane and butane, and many alcohols. The material carries a published service range of -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 construction equipment, hydraulic and pneumatic systems, and agricultural equipment.

Stocked as H5.3X185 and sold individually. Unit weight is approximately 16.722 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Item
H5.3X185
Description
5.3MM CS X 185MM ID BLACK BUNA 70D
Actual Outside Diameter
195.6 mm (7.7 inch)
Actual Cross Section
5.3 mm (0.209 inch)
Actual Inside Diameter
185 mm (7.283 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity