5.7MM CS X 66.6MM ID BLACK BUNA 70D

Buna-N O-Ring, 5.7 x 66.6 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:
H5.7X66.6
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Product Specification

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The H5.7X66.6 is a black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 66.6 mm (2.622 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 78 mm (3.07 in). This o-ring remains the most cost-effective sealing element available for pressurized assemblies. Source specification: Metric O-RING, JIS P67.

Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, an economical choice for high-volume maintenance programs. This material stands up to water, propane and butane, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C).

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

Order part number H5.7X66.6, sold individually. Unit weight is approximately 7.0517 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Item
H5.7X66.6
Description
5.7MM CS X 66.6MM ID BLACK BUNA 70D
Actual Outside Diameter
78 mm (3.07 inch)
Actual Cross Section
5.7 mm (0.224 inch)
Actual Inside Diameter
66.6 mm (2.622 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity