5.7MM CS X 174.2MM ID BLACK BUNA 70D

Buna-N O-Ring, 5.7 x 174.2 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:
H5.7X174.2
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Product Specification

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The H5.7X174.2 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 174.2 mm (6.858 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 185.6 mm (7.31 in). This o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The material holds up against petroleum-based oils, water, and propane and butane. Buna-N (Nitrile) is valued for reliable performance in both static and dynamic service, the most widely specified general-purpose sealing elastomer. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Exposure to automotive brake fluid or ozone and direct sunlight will shorten service life.

Typical settings include automotive, hydraulic and pneumatic systems, and fluid power.

Order part number H5.7X174.2, sold individually. Unit weight is approximately 17.453 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Item
H5.7X174.2
Description
5.7MM CS X 174.2MM ID BLACK BUNA 70D
Actual Outside Diameter
185.6 mm (7.31 inch)
Actual Cross Section
5.7 mm (0.224 inch)
Actual Inside Diameter
174.2 mm (6.858 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity