5.7MM CS X 209.3MM ID BLACK BUNA 70D

Buna-N O-Ring, 5.7 x 209.3 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:
H5.7X209.3
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Product Specification

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APG stocks the H5.7X209.3, a black Buna-N (Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 209.3 mm (8.24 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 220.7 mm (8.69 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. Additional detail on this item: Metric O-RING, JIS G210.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, most widely specified general-purpose sealing elastomer. The compound resists hydraulic fluids, water, and greases and lubricants. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to ozone and direct sunlight or automotive brake fluid will shorten service life.

You will find this material specified across hydraulic and pneumatic systems, fluid power, and agricultural equipment.

Reference part number H5.7X209.3 when ordering; the item is sold individually. Unit weight is approximately 21.205 g. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.
Item
H5.7X209.3
Description
5.7MM CS X 209.3MM ID BLACK BUNA 70D
Actual Outside Diameter
220.7 mm (8.69 inch)
Actual Cross Section
5.7 mm (0.224 inch)
Actual Inside Diameter
209.3 mm (8.24 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity