5.7MM CS X 234.3MM ID BLACK BUNA 70D

Buna-N O-Ring, 5.7 x 234.3 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:
H5.7X234.3
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Product Specification

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H5.7X234.3 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 234.3 mm (9.224 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 245.7 mm (9.67 in). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware. This item is further identified as Metric O-RING, JIS G235.

Buna-N (Nitrile) is known for strong abrasion and tear resistance, the most widely specified general-purpose sealing elastomer. This material stands up to greases and lubricants, water, and propane and butane. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where strong acids or automotive brake fluid are present.

It sees regular use in automotive, hydraulic and pneumatic systems, and construction equipment.

H5.7X234.3 ships individually. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Item
H5.7X234.3
Description
5.7MM CS X 234.3MM ID BLACK BUNA 70D
Actual Outside Diameter
245.7 mm (9.67 inch)
Actual Cross Section
5.7 mm (0.224 inch)
Actual Inside Diameter
234.3 mm (9.224 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity