6MM CS X 78MM ID BLACK BUNA 70D

Buna-N O-Ring, 6 x 78 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:
H6X78
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A with an inside diameter of 78 mm (3.071 in), a cross section of 6 mm (0.236 in), and an outside diameter of 90 mm (3.54 in), catalogued under part number H6X78. It compresses into its gland to block fluid or gas migration across a joint.

As a material, Buna-N (Nitrile) is widely chosen for the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. The material holds up against greases and lubricants, many alcohols, and propane and butane. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It should not be specified for service in polar solvents or ketones.

You will find this material specified across automotive, hydraulic and pneumatic systems, and general industrial maintenance.

Reference part number H6X78 when ordering; the item is sold individually. Unit weight is approximately 9.1125 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
H6X78
Description
6MM CS X 78MM ID BLACK BUNA 70D
Actual Outside Diameter
90 mm (3.54 inch)
Actual Cross Section
6 mm (0.236 inch)
Actual Inside Diameter
78 mm (3.071 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity