1.78MM CS X 3.2MM ID BLACK BUNA 70D

Buna-N O-Ring, 1.78 x 3.2 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:
H1.78X3.2
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Product Specification

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H1.78X3.2 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.2 mm (0.126 in), a cross section of 1.78 mm (0.07 in), and an outside diameter of 6.76 mm (0.27 in). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.

Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs and low compression set under sustained load. This material stands up to propane and butane, water, and many alcohols. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C).

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

This item is sold individually under part number H1.78X3.2. Review your operating media and conditions against this specification before installation.
Item
H1.78X3.2
Description
1.78MM CS X 3.2MM ID BLACK BUNA 70D
Actual Outside Diameter
6.76 mm (0.27 inch)
Actual Cross Section
1.78 mm (0.07 inch)
Actual Inside Diameter
3.2 mm (0.126 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity