5.7MM CS X 339.3MM ID BLACK BUNA 70D

Buna-N O-Ring, 5.7 x 339.3 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:
H5.7X339.3
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Product Specification

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This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A measuring an inside diameter of 339.3 mm (13.358 in), a cross section of 5.7 mm (0.224 in), and an outside diameter of 350.7 mm (13.81 in), catalogued under part number H5.7X339.3. It compresses into its gland to block fluid or gas migration across a joint. Additional detail on this item: Metric O-RING, JIS G340.

The material holds up against hydraulic fluids, greases and lubricants, and propane and butane. Buna-N (Nitrile) is specified for an economical choice for high-volume maintenance programs and the most widely specified general-purpose sealing elastomer. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or strong acids call for a different compound.

Common environments for this compound include agricultural equipment, general industrial maintenance, and construction equipment.

Stocked as H5.7X339.3 and sold individually. Review your operating media and conditions against this specification before installation.
Item
H5.7X339.3
Description
5.7MM CS X 339.3MM ID BLACK BUNA 70D
Actual Outside Diameter
350.7 mm (13.81 inch)
Actual Cross Section
5.7 mm (0.224 inch)
Actual Inside Diameter
339.3 mm (13.358 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity