3MM CS X 149MM ID BLACK BUNA 70D

Buna-N O-Ring, 3 x 149 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:
H3X149
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Product Specification

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Part number H3X149 is a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 149 mm (5.866 in), a cross section of 3 mm (0.118 in), and an outside diameter of 155 mm (6.1 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The compound resists many alcohols, propane and butane, and water. Buna-N (Nitrile) offers the most widely specified general-purpose sealing elastomer, strong abrasion and tear resistance. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or ketones are present.

You will find this material specified across hydraulic and pneumatic systems, fluid power, and construction equipment.

Order part number H3X149, sold individually. Unit weight is approximately 4.122 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Item
H3X149
Description
3MM CS X 149MM ID BLACK BUNA 70D
Actual Outside Diameter
155 mm (6.1 inch)
Actual Cross Section
3 mm (0.118 inch)
Actual Inside Diameter
149 mm (5.866 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity