3MM CS X 50MM ID BLACK BUNA 70D

Buna-N O-Ring, 3 x 50 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:
H3X50
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Product Specification

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APG stocks the H3X50, a black Buna-N (Nitrile) 70 Shore A O-Ring built to an inside diameter of 50 mm (1.969 in), a cross section of 3 mm (0.118 in), and an outside diameter of 56 mm (2.2 in). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, Buna-N (Nitrile) delivers low compression set under sustained load and an economical choice for high-volume maintenance programs. Expect good resistance to hydraulic fluids, greases and lubricants, and petroleum-based oils. Continuous operating temperature is published at -40°F (-40°C) to 250°F (121.1°C). Applications involving automotive brake fluid or ozone and direct sunlight call for a different compound.

You will find this material specified across general industrial maintenance, automotive, and agricultural equipment.

Stocked as H3X50 and sold individually. Unit weight is approximately 1.463 g. As always, verify media compatibility and operating conditions against the requirements of your specific application.
Item
H3X50
Description
3MM CS X 50MM ID BLACK BUNA 70D
Actual Outside Diameter
56 mm (2.2 inch)
Actual Cross Section
3 mm (0.118 inch)
Actual Inside Diameter
50 mm (1.969 inch)
FDA Compliant
No
Measurement System
Metric
Metal Detectable
No
NSF Certified
No
Product Code
6015
Product Category
O-Rings - Metric - Commodity